diff --git a/build.gradle b/build.gradle
index deca6ed..3e46775 100644
--- a/build.gradle
+++ b/build.gradle
@@ -35,6 +35,7 @@ dependencies {
 	testImplementation 'org.springframework.boot:spring-boot-starter-data-jpa-test'
 	testImplementation 'org.springframework.boot:spring-boot-starter-webmvc-test'
 	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+	implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.5.0'
 }
 
 tasks.named('test') {
diff --git a/dami_ms_ss2/.idea/compiler.xml b/dami_ms_ss2/.idea/compiler.xml
new file mode 100644
index 0000000..6f2089d
--- /dev/null
+++ b/dami_ms_ss2/.idea/compiler.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Gradle Imported" enabled="true">
+        <outputRelativeToContentRoot value="true" />
+        <processorPath useClasspath="false">
+          <entry name="$PROJECT_DIR$/../.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-configuration-processor/4.0.4/913032ff41310689ddbd9038f50956cd9dc740a2/spring-boot-configuration-processor-4.0.4.jar" />
+          <entry name="$PROJECT_DIR$/../.gradle/caches/modules-2/files-2.1/org.projectlombok/lombok/1.18.44/503fd0b002dbb237fa4656cf4b8021666a8aebac/lombok-1.18.44.jar" />
+        </processorPath>
+        <module name="session.main" />
+      </profile>
+    </annotationProcessing>
+  </component>
+  <component name="JavacSettings">
+    <option name="ADDITIONAL_OPTIONS_OVERRIDE">
+      <module name="session" options="-parameters" />
+      <module name="session.main" options="-parameters" />
+      <module name="session.test" options="-parameters" />
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/dami_ms_ss2/.idea/gradle.xml b/dami_ms_ss2/.idea/gradle.xml
new file mode 100644
index 0000000..f35f741
--- /dev/null
+++ b/dami_ms_ss2/.idea/gradle.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$/SpringCRUDSession" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$/SpringCRUDSession" />
+          </set>
+        </option>
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/dami_ms_ss2/.idea/misc.xml b/dami_ms_ss2/.idea/misc.xml
new file mode 100644
index 0000000..55222c3
--- /dev/null
+++ b/dami_ms_ss2/.idea/misc.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_26" project-jdk-name="ms-21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/dami_ms_ss2/.idea/modules.xml b/dami_ms_ss2/.idea/modules.xml
new file mode 100644
index 0000000..9fb9d01
--- /dev/null
+++ b/dami_ms_ss2/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/ms_session.iml" filepath="$PROJECT_DIR$/.idea/ms_session.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/dami_ms_ss2/.idea/workspace.xml b/dami_ms_ss2/.idea/workspace.xml
new file mode 100644
index 0000000..71cdc3b
--- /dev/null
+++ b/dami_ms_ss2/.idea/workspace.xml
@@ -0,0 +1,99 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AutoImportSettings">
+    <option name="autoReloadType" value="SELECTIVE" />
+  </component>
+  <component name="ChangeListManager">
+    <list default="true" id="b0297b4f-e4e6-4a9d-9228-8603ebf3c440" name="Changes" comment="">
+      <change beforePath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/controller/BoardController.java" beforeDir="false" afterPath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/controller/BoardController.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/domain/Board.java" beforeDir="false" afterPath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/domain/Board.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardCreateRequest.java" beforeDir="false" afterPath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardCreateRequest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardResponse.java" beforeDir="false" afterPath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardResponse.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java" beforeDir="false" afterPath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/service/BoardService.java" beforeDir="false" afterPath="$PROJECT_DIR$/SpringCRUDSession/src/main/java/com/likelion/session/service/BoardService.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/SpringCRUDSession/src/test/java/com/likelion/session/SessionApplicationTests.java" beforeDir="false" afterPath="$PROJECT_DIR$/SpringCRUDSession/src/test/java/com/likelion/session/SessionApplicationTests.java" afterDir="false" />
+    </list>
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="ExternalProjectsData">
+    <projectState path="$PROJECT_DIR$/SpringCRUDSession">
+      <ProjectState />
+    </projectState>
+  </component>
+  <component name="ExternalProjectsManager">
+    <system id="GRADLE">
+      <state>
+        <projects_view>
+          <tree_state>
+            <expand>
+              <path>
+                <item name="" type="6a2764b6:ExternalProjectsStructure$RootNode" />
+                <item name="session" type="f1a62948:ProjectNode" />
+              </path>
+            </expand>
+            <select />
+          </tree_state>
+        </projects_view>
+      </state>
+    </system>
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$/SpringCRUDSession" />
+  </component>
+  <component name="ProjectColorInfo"><![CDATA[{
+  "associatedIndex": 5,
+  "fromUser": false
+}]]></component>
+  <component name="ProjectId" id="3C7IazCrTIbdsEtC20aQQs8dgyD" />
+  <component name="ProjectViewState">
+    <option name="hideEmptyMiddlePackages" value="true" />
+    <option name="showLibraryContents" value="true" />
+  </component>
+  <component name="PropertiesComponent"><![CDATA[{
+  "keyToString": {
+    "Gradle.Build SpringCRUDSession.executor": "Run",
+    "RunOnceActivity.ShowReadmeOnStart": "true",
+    "RunOnceActivity.git.unshallow": "true",
+    "RunOnceActivity.typescript.service.memoryLimit.init": "true",
+    "Spring Boot.SessionApplication.executor": "Run",
+    "codeWithMe.voiceChat.enabledByDefault": "false",
+    "git-widget-placeholder": "master",
+    "kotlin-language-version-configured": "true",
+    "last_opened_file_path": "C:/Users/dami6/dami_ms_ss2",
+    "settings.editor.selected.configurable": "build.tools",
+    "vue.rearranger.settings.migration": "true"
+  }
+}]]></component>
+  <component name="RecentsManager">
+    <key name="CopyFile.RECENT_KEYS">
+      <recent name="C:\Users\dami6" />
+    </key>
+  </component>
+  <component name="RunManager">
+    <configuration name="SessionApplication" type="SpringBootApplicationConfigurationType" factoryName="Spring Boot" nameIsGenerated="true">
+      <option name="FRAME_DEACTIVATION_UPDATE_POLICY" value="UpdateClassesAndResources" />
+      <module name="session.main" />
+      <option name="SPRING_BOOT_MAIN_CLASS" value="com.likelion.session.SessionApplication" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+  </component>
+  <component name="TaskManager">
+    <task active="true" id="Default" summary="Default task">
+      <changelist id="b0297b4f-e4e6-4a9d-9228-8603ebf3c440" name="Changes" comment="" />
+      <created>1775730248928</created>
+      <option name="number" value="Default" />
+      <option name="presentableId" value="Default" />
+      <updated>1775730248928</updated>
+      <workItem from="1775730250133" duration="1700000" />
+    </task>
+    <servers />
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="3" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/.gitattributes b/dami_ms_ss2/SpringCRUDSession/.gitattributes
new file mode 100644
index 0000000..8af972c
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/.gitattributes
@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary
diff --git a/dami_ms_ss2/SpringCRUDSession/.gitignore b/dami_ms_ss2/SpringCRUDSession/.gitignore
new file mode 100644
index 0000000..6a87385
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/.gitignore
@@ -0,0 +1,40 @@
+application.yaml
+.env
+
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
diff --git a/dami_ms_ss2/SpringCRUDSession/board/.gitignore b/dami_ms_ss2/SpringCRUDSession/board/.gitignore
new file mode 100644
index 0000000..1fac4d5
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/board/.gitignore
@@ -0,0 +1,43 @@
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+.kotlin
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/board/build.gradle b/dami_ms_ss2/SpringCRUDSession/board/build.gradle
new file mode 100644
index 0000000..973cc48
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/board/build.gradle
@@ -0,0 +1,20 @@
+plugins {
+    id 'java'
+}
+
+group = 'org.example'
+version = '1.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation platform('org.junit:junit-bom:5.10.0')
+    testImplementation 'org.junit.jupiter:junit-jupiter'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+test {
+    useJUnitPlatform()
+}
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.jar b/dami_ms_ss2/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..249e583
Binary files /dev/null and b/dami_ms_ss2/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/dami_ms_ss2/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.properties b/dami_ms_ss2/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..e04915b
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Wed Mar 25 13:04:36 KST 2026
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/dami_ms_ss2/SpringCRUDSession/board/gradlew b/dami_ms_ss2/SpringCRUDSession/board/gradlew
new file mode 100644
index 0000000..1b6c787
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/board/gradlew
@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/dami_ms_ss2/SpringCRUDSession/board/gradlew.bat b/dami_ms_ss2/SpringCRUDSession/board/gradlew.bat
new file mode 100644
index 0000000..107acd3
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/board/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/dami_ms_ss2/SpringCRUDSession/board/settings.gradle b/dami_ms_ss2/SpringCRUDSession/board/settings.gradle
new file mode 100644
index 0000000..311f804
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/board/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'board'
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/board/src/main/java/org/example/Main.java b/dami_ms_ss2/SpringCRUDSession/board/src/main/java/org/example/Main.java
new file mode 100644
index 0000000..876719a
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/board/src/main/java/org/example/Main.java
@@ -0,0 +1,17 @@
+package org.example;
+
+//TIP 코드를 <b>실행</b>하려면 <shortcut actionId="Run"/>을(를) 누르거나
+// 에디터 여백에 있는 <icon src="AllIcons.Actions.Execute"/> 아이콘을 클릭하세요.
+public class Main {
+    public static void main(String[] args) {
+        //TIP 캐럿을 강조 표시된 텍스트에 놓고 <shortcut actionId="ShowIntentionActions"/>을(를) 누르면
+        // IntelliJ IDEA이(가) 수정을 제안하는 것을 확인할 수 있습니다.
+        System.out.printf("Hello and welcome!");
+
+        for (int i = 1; i <= 5; i++) {
+            //TIP <shortcut actionId="Debug"/>을(를) 눌러 코드 디버그를 시작하세요. 1개의 <icon src="AllIcons.Debugger.Db_set_breakpoint"/> 중단점을 설정해 드렸습니다
+            // 언제든 <shortcut actionId="ToggleLineBreakpoint"/>을(를) 눌러 중단점을 더 추가할 수 있습니다.
+            System.out.println("i = " + i);
+        }
+    }
+}
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/board/src/main/resources/application.yml b/dami_ms_ss2/SpringCRUDSession/board/src/main/resources/application.yml
new file mode 100644
index 0000000..4733b81
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/board/src/main/resources/application.yml
@@ -0,0 +1,28 @@
+server:
+  port: 8080
+
+spring:
+  application:
+    name: session
+
+  datasource:
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    url: jdbc:mysql://localhost:3306/session?serverTimezone=Asia/Seoul&characterEncoding=UTF-8
+    username: root
+    password: yebin1448!
+
+  jpa:
+    hibernate:
+      ddl-auto: update
+    show-sql: true
+    properties:
+      hibernate:
+        format_sql: true
+
+  jackson:
+    serialization:
+      fail-on-empty-beans: false
+
+logging:
+  level:
+    org.hibernate.SQL: debug
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/build.gradle b/dami_ms_ss2/SpringCRUDSession/build.gradle
new file mode 100644
index 0000000..e771751
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/build.gradle
@@ -0,0 +1,45 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '4.0.4'
+	id 'io.spring.dependency-management' version '1.1.7'
+
+}
+
+group = 'com.likelion'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(21)
+	}
+}
+
+configurations {
+	compileOnly {
+		extendsFrom annotationProcessor
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'org.springframework.boot:spring-boot-starter-webmvc'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
+	implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.5.0'
+
+	compileOnly 'org.projectlombok:lombok'
+	developmentOnly 'org.springframework.boot:spring-boot-devtools'
+	runtimeOnly 'com.mysql:mysql-connector-j'
+	annotationProcessor 'org.springframework.boot:spring-boot-configuration-processor'
+	annotationProcessor 'org.projectlombok:lombok'
+	testImplementation 'org.springframework.boot:spring-boot-starter-data-jpa-test'
+	testImplementation 'org.springframework.boot:spring-boot-starter-webmvc-test'
+	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
diff --git a/dami_ms_ss2/SpringCRUDSession/gradle/wrapper/gradle-wrapper.jar b/dami_ms_ss2/SpringCRUDSession/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..d997cfc
Binary files /dev/null and b/dami_ms_ss2/SpringCRUDSession/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/dami_ms_ss2/SpringCRUDSession/gradle/wrapper/gradle-wrapper.properties b/dami_ms_ss2/SpringCRUDSession/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..dbc3ce4
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/dami_ms_ss2/SpringCRUDSession/gradlew b/dami_ms_ss2/SpringCRUDSession/gradlew
new file mode 100644
index 0000000..0262dcb
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/gradlew
@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/b631911858264c0b6e4d6603d677ff5218766cee/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/dami_ms_ss2/SpringCRUDSession/gradlew.bat b/dami_ms_ss2/SpringCRUDSession/gradlew.bat
new file mode 100644
index 0000000..c4bdd3a
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/gradlew.bat
@@ -0,0 +1,93 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/dami_ms_ss2/SpringCRUDSession/settings.gradle b/dami_ms_ss2/SpringCRUDSession/settings.gradle
new file mode 100644
index 0000000..ade3347
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'session'
diff --git a/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/SessionApplication.java b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/SessionApplication.java
new file mode 100644
index 0000000..64dda82
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/SessionApplication.java
@@ -0,0 +1,13 @@
+package com.likelion.session;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication //Spring Boot 애플리케이션의 시작점이며 설정·컴포넌트 스캔을 한 번에 처리하는 핵심 어노테이션
+public class SessionApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SessionApplication.class, args);
+	}
+
+}
diff --git a/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/controller/BoardController.java b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/controller/BoardController.java
new file mode 100644
index 0000000..084a1c2
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/controller/BoardController.java
@@ -0,0 +1,91 @@
+package com.likelion.session.controller;
+
+import com.likelion.session.dto.BoardCreateRequest;
+import com.likelion.session.dto.BoardResponse;
+import com.likelion.session.dto.BoardUpdateRequest;
+import com.likelion.session.service.BoardService;
+import io.swagger.v3.oas.annotations.Operation;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController //요청 받으면 JSON 같은 데이터만 반환하는 클래스
+@RequestMapping("/boards") //Spring Framework에서 “요청 URL 경로를 매핑(연결)하는 설정.
+// /boards"로 들어오는 요청을 이 컨트롤러(또는 메서드)가 처리하겠다는 뜻
+@RequiredArgsConstructor //필수 필드만 파라미터로 받는 생성자를 자동 생성
+
+public class BoardController {
+
+    private final BoardService boardService;
+
+    /*
+        게시글 생성
+
+        [요청 흐름]
+        Client
+        -> DispatcherServlet
+        -> HandlerMapping
+        -> BoardController의 create() 메서드 선택
+        -> Service 호출
+        -> Repository 호출
+        -> DB 저장
+        -> 결과 반환
+        -> JSON 응답
+     */
+    @Operation( //이 API가 뭔지 설명해주는 주석
+            summary = "게시글 생성",
+            description = "새로운 게시글을 생성합니다."
+    )
+    @PostMapping //POST 요청을 받아서 데이터를 생성/처리하는 API 연결 어노테이션
+    public ResponseEntity<BoardResponse> create(@RequestBody BoardCreateRequest request) {
+        BoardResponse response = boardService.create(request);
+        return ResponseEntity.ok(response);
+    }
+
+    // 게시글 전체 조회
+    @Operation( //이 API가 뭔지 설명해주는 주석
+            summary = "게시글 전체 조회",
+            description = "등록된 모든 게시글을 조회합니다."
+    )
+    @GetMapping //GET 요청을 받아서 데이터를 조회하는 API 연결 어노테이션
+    public ResponseEntity<List<BoardResponse>> findAll() {
+        List<BoardResponse> response = boardService.findAll();
+        return ResponseEntity.ok(response);
+    }
+
+    // 게시글 단건 조회
+    @Operation( //이 API가 뭔지 설명해주는 주석
+            summary = "게시글 단건 조회",
+            description = "id로 특정 게시글을 조회합니다."
+    )
+    @GetMapping("/{id}") //URL 경로에 있는 id 값을 받아 해당 데이터를 조회하는 GET API 매핑
+    public ResponseEntity<BoardResponse> findById(@PathVariable Long id) {
+        BoardResponse response = boardService.findById(id);
+        return ResponseEntity.ok(response);
+    }
+
+    // 게시글 수정
+    @Operation( //이 API가 뭔지 설명해주는 주석
+            summary = "게시글 수정",
+            description = "id로 특정 게시글의 제목과 내용을 수정합니다."
+    )
+    @PutMapping("/{id}") //URL의 id에 해당하는 데이터를 수정하는 PUT API 매핑
+    public ResponseEntity<BoardResponse> update(@PathVariable Long id,
+                                                @RequestBody BoardUpdateRequest request) {
+        BoardResponse response = boardService.update(id, request);
+        return ResponseEntity.ok(response);
+    }
+
+    // 게시글 삭제
+    @Operation( //이 API가 뭔지 설명해주는 주석
+            summary = "게시글 삭제",
+            description = "id로 특정 게시글을 삭제합니다."
+    )
+    @DeleteMapping("/{id}") //URL의 id에 해당하는 데이터를 삭제하는 DELETE API 매핑
+    public ResponseEntity<Void> delete(@PathVariable Long id) {
+        boardService.delete(id);
+        return ResponseEntity.noContent().build();
+    }
+}
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/domain/Board.java b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/domain/Board.java
new file mode 100644
index 0000000..d1b15ed
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/domain/Board.java
@@ -0,0 +1,66 @@
+package com.likelion.session.domain;
+
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.AllArgsConstructor;
+
+import java.time.LocalDateTime;
+
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@Entity //자바 객체를 DB 테이블로 매핑하는 표시
+@Table(name = "boards") //이 엔티티가 어떤 DB 테이블 이름과 매핑되는지 지정하는 역할. 이 클래스는 DB의 "boards" 테이블과 연결된다.
+@NoArgsConstructor(access = AccessLevel.PROTECTED) //외부에서는 못 쓰고, 내부/상속/JPA만 쓸 수 있는 기본 생성자 생성
+@AllArgsConstructor //모든 필드를 한 번에 초기화하는 생성자 생성
+
+public class Board {
+
+    @Id //데이터베이스에서 해당 엔티티의 기본키를 지정하는 어노테이션
+    @GeneratedValue(strategy = GenerationType.IDENTITY) //기본키 값을 DB가 자동으로 증가해서 생성하도록 설정하는 어노테이션
+    private Long id;
+
+    // 게시글 제목
+    @Column(nullable = false, length = 100) //엔티티 필드를 데이터베이스 컬럼과 매핑하는 어노테이션
+    private String title;
+
+    // 게시글 내용
+    @Column(nullable = false, columnDefinition = "TEXT") //엔티티 필드를 데이터베이스 컬럼과 매핑하는 어노테이션
+    private String content;
+
+    // 작성자
+    @Column(nullable = false, length = 30) //엔티티 필드를 데이터베이스 컬럼과 매핑하는 어노테이션
+    private String writer;
+
+    // 생성 시간
+    @Column(nullable = false) //엔티티 필드를 데이터베이스 컬럼과 매핑하는 어노테이션
+    private LocalDateTime createdAt;
+
+    // 수정 시간
+    @Column(nullable = false) //엔티티 필드를 데이터베이스 컬럼과 매핑하는 어노테이션
+    private LocalDateTime updatedAt;
+
+
+    public Board(String title, String content, String writer) {
+        this.title = title;
+        this.content = content;
+        this.writer = writer;
+    }
+
+    @PrePersist //엔티티가 DB에 저장되기 전에 실행되는 메서드를 지정하는 어노테이션
+    public void prePersist() {
+        this.createdAt = LocalDateTime.now();
+        this.updatedAt = LocalDateTime.now();
+    }
+
+    @PreUpdate //엔티티가 DB에서 수정되기 전에 실행되는 메서드를 지정하는 어노테이션
+    public void preUpdate() {
+        this.updatedAt = LocalDateTime.now();
+    }
+
+
+    public void update(String title, String content) {
+        this.title = title;
+        this.content = content;
+    }
+}
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardCreateRequest.java b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardCreateRequest.java
new file mode 100644
index 0000000..f871bbe
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardCreateRequest.java
@@ -0,0 +1,17 @@
+package com.likelion.session.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@Setter //setter 메서드를 자동 생성해줌
+@NoArgsConstructor //매개변수가 없는 기본 생성자를 자동으로 만들어 줌
+@AllArgsConstructor //모든 필드를 매개변수로 받는 생성자를 자동으로 만들어줌
+
+public class BoardCreateRequest {
+    private String title;
+    private String content;
+    private String writer;
+}
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardResponse.java b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardResponse.java
new file mode 100644
index 0000000..4e7fcd2
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardResponse.java
@@ -0,0 +1,22 @@
+package com.likelion.session.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+
+import java.time.LocalDateTime;
+
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@AllArgsConstructor //모든 필드를 매개변수로 받는 생성자를 자동으로 만들어줌
+@Builder //객체를 빌더 패턴으로 생성할 수 있게 해주는 기능
+//빌더 패턴: 복잡한 객체를 단계적으로 생성하는 디자인 패턴
+
+public class BoardResponse {
+
+    private Long id;
+    private String title;
+    private String content;
+    private String writer;
+    private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
+}
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java
new file mode 100644
index 0000000..2fd7131
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java
@@ -0,0 +1,21 @@
+package com.likelion.session.dto;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.Size;
+
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@Setter //setter 메서드를 자동 생성해줌
+@NoArgsConstructor //매개변수가 없는 기본 생성자를 자동으로 만들어 줌
+public class BoardUpdateRequest {
+    @NotBlank(message = "제목은 필수입니다.") //문자열이 null이 아니고 공백이 아닌 값이어야 함을 검증하는 어노테이션
+    @Size(max = 100, message = "제목은 100자 이하로 입력해주세요.") //문자열이나 컬렉션의 길이(크기)를 제한하는 검증 어노테이션
+    private String title;
+
+    @NotBlank(message = "내용은 필수입니다.")
+    private String content;
+}
+
diff --git a/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/repository/BoardRepository.java b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/repository/BoardRepository.java
new file mode 100644
index 0000000..65a424d
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/repository/BoardRepository.java
@@ -0,0 +1,7 @@
+package com.likelion.session.repository;
+
+import com.likelion.session.domain.Board;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface BoardRepository extends JpaRepository<Board, Long> {
+}
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/service/BoardService.java b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/service/BoardService.java
new file mode 100644
index 0000000..77d8121
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/src/main/java/com/likelion/session/service/BoardService.java
@@ -0,0 +1,123 @@
+package com.likelion.session.service;
+
+import com.likelion.session.domain.Board;
+import com.likelion.session.dto.BoardCreateRequest;
+import com.likelion.session.dto.BoardResponse;
+import com.likelion.session.dto.BoardUpdateRequest;
+import com.likelion.session.repository.BoardRepository;
+import org.springframework.transaction.annotation.Transactional;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Slf4j //로그 출력을 위한 log 객체를 자동으로 생성해주는 어노테이션
+@Service //이 클래스가 비즈니스 로직을 처리하는 클래스임을 스프링에게 알려줌.
+@RequiredArgsConstructor //final이 붙은 필드(boardRepository)를 생성자로 자동 주입해줌
+@Transactional //DB 작업 도중 에러가 나면 모든 작업을 이전으로 롤백함
+
+public class BoardService {
+
+    private final BoardRepository boardRepository;
+
+    /*
+        게시글 생성
+        - Controller가 넘겨준 요청 DTO를 받아서
+        - Entity로 바꾼 뒤
+        - Repository를 통해 DB에 저장
+        - 저장된 결과를 Response DTO로 변환해서 반환
+     */
+    public BoardResponse create(BoardCreateRequest request) {
+        Board board = new Board(
+                request.getTitle(),
+                request.getContent(),
+                request.getWriter()
+        );
+
+        Board savedBoard = boardRepository.save(board);
+
+        return BoardResponse.builder()
+                .id(savedBoard.getId())
+                .title(savedBoard.getTitle())
+                .content(savedBoard.getContent())
+                .writer(savedBoard.getWriter())
+                .createdAt(savedBoard.getCreatedAt())
+                .updatedAt(savedBoard.getUpdatedAt())
+                .build();
+    }
+
+    /*
+        게시글 전체 조회
+        - DB에 있는 모든 게시글을 가져옴
+        - Entity 리스트를 Response DTO 리스트로 변환
+     */
+    @Transactional(readOnly = true)
+    public List<BoardResponse> findAll() {
+        return boardRepository.findAll()
+                .stream()
+                .map(board -> BoardResponse.builder()
+                        .id(board.getId())
+                        .title(board.getTitle())
+                        .content(board.getContent())
+                        .writer(board.getWriter())
+                        .createdAt(board.getCreatedAt())
+                        .updatedAt(board.getUpdatedAt())
+                        .build())
+                .toList();
+    }
+
+    /*
+        게시글 단건 조회
+        - id로 게시글 조회
+        - 없으면 예외 발생
+     */
+    @Transactional(readOnly = true)
+    public BoardResponse findById(Long id) {
+        Board board = boardRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("해당 게시글이 없습니다. id=" + id));
+
+        return BoardResponse.builder()
+                .id(board.getId())
+                .title(board.getTitle())
+                .content(board.getContent())
+                .writer(board.getWriter())
+                .createdAt(board.getCreatedAt())
+                .updatedAt(board.getUpdatedAt())
+                .build();
+    }
+
+    /*
+        게시글 수정
+        - 기존 게시글을 찾음
+        - 엔티티의 update 메서드로 값 변경
+        - JPA 변경 감지로 update 반영
+     */
+    public BoardResponse update(Long id, BoardUpdateRequest request) {
+        Board board = boardRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("해당 게시글이 없습니다. id=" + id));
+
+        board.update(request.getTitle(), request.getContent());
+
+        return BoardResponse.builder()
+                .id(board.getId())
+                .title(board.getTitle())
+                .content(board.getContent())
+                .writer(board.getWriter())
+                .createdAt(board.getCreatedAt())
+                .updatedAt(board.getUpdatedAt())
+                .build();
+    }
+
+    /*
+        게시글 삭제
+        - id로 게시글을 찾고
+        - 있으면 삭제
+     */
+    public void delete(Long id) {
+        Board board = boardRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("해당 게시글이 없습니다. id=" + id));
+
+        boardRepository.delete(board);
+    }
+}
\ No newline at end of file
diff --git a/dami_ms_ss2/SpringCRUDSession/src/test/java/com/likelion/session/SessionApplicationTests.java b/dami_ms_ss2/SpringCRUDSession/src/test/java/com/likelion/session/SessionApplicationTests.java
new file mode 100644
index 0000000..f4185b3
--- /dev/null
+++ b/dami_ms_ss2/SpringCRUDSession/src/test/java/com/likelion/session/SessionApplicationTests.java
@@ -0,0 +1,13 @@
+package com.likelion.session;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest //실제 서버처럼 스프링 환경을 다 켜고 테스트하는 것
+class SessionApplicationTests {
+
+	@Test //해당 메서드를 테스트 코드로 실행하도록 지정하는 어노테이션
+	void contextLoads() {
+	}
+
+}
diff --git a/ms_session/.idea/.gitignore b/ms_session/.idea/.gitignore
new file mode 100644
index 0000000..30cf57e
--- /dev/null
+++ b/ms_session/.idea/.gitignore
@@ -0,0 +1,10 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Ignored default folder with query files
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/ms_session/.idea/misc.xml b/ms_session/.idea/misc.xml
new file mode 100644
index 0000000..b67a5b0
--- /dev/null
+++ b/ms_session/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_26" project-jdk-name="ms-21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/ms_session/.idea/modules.xml b/ms_session/.idea/modules.xml
new file mode 100644
index 0000000..9fb9d01
--- /dev/null
+++ b/ms_session/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/ms_session.iml" filepath="$PROJECT_DIR$/.idea/ms_session.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/ms_session/.idea/ms_session.iml b/ms_session/.idea/ms_session.iml
new file mode 100644
index 0000000..d6ebd48
--- /dev/null
+++ b/ms_session/.idea/ms_session.iml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/ms_session/.idea/vcs.xml b/ms_session/.idea/vcs.xml
new file mode 100644
index 0000000..286b7ad
--- /dev/null
+++ b/ms_session/.idea/vcs.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/SpringCRUDSession" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/.gitattributes b/ms_session/SpringCRUDSession/.gitattributes
new file mode 100644
index 0000000..8af972c
--- /dev/null
+++ b/ms_session/SpringCRUDSession/.gitattributes
@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary
diff --git a/ms_session/SpringCRUDSession/.gitignore b/ms_session/SpringCRUDSession/.gitignore
new file mode 100644
index 0000000..6a87385
--- /dev/null
+++ b/ms_session/SpringCRUDSession/.gitignore
@@ -0,0 +1,40 @@
+application.yaml
+.env
+
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
diff --git a/ms_session/SpringCRUDSession/board/.gitignore b/ms_session/SpringCRUDSession/board/.gitignore
new file mode 100644
index 0000000..1fac4d5
--- /dev/null
+++ b/ms_session/SpringCRUDSession/board/.gitignore
@@ -0,0 +1,43 @@
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+.kotlin
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/board/build.gradle b/ms_session/SpringCRUDSession/board/build.gradle
new file mode 100644
index 0000000..973cc48
--- /dev/null
+++ b/ms_session/SpringCRUDSession/board/build.gradle
@@ -0,0 +1,20 @@
+plugins {
+    id 'java'
+}
+
+group = 'org.example'
+version = '1.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation platform('org.junit:junit-bom:5.10.0')
+    testImplementation 'org.junit.jupiter:junit-jupiter'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+test {
+    useJUnitPlatform()
+}
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.jar b/ms_session/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..249e583
Binary files /dev/null and b/ms_session/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/ms_session/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.properties b/ms_session/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..e04915b
--- /dev/null
+++ b/ms_session/SpringCRUDSession/board/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Wed Mar 25 13:04:36 KST 2026
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/ms_session/SpringCRUDSession/board/gradlew b/ms_session/SpringCRUDSession/board/gradlew
new file mode 100644
index 0000000..1b6c787
--- /dev/null
+++ b/ms_session/SpringCRUDSession/board/gradlew
@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/ms_session/SpringCRUDSession/board/gradlew.bat b/ms_session/SpringCRUDSession/board/gradlew.bat
new file mode 100644
index 0000000..107acd3
--- /dev/null
+++ b/ms_session/SpringCRUDSession/board/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/ms_session/SpringCRUDSession/board/settings.gradle b/ms_session/SpringCRUDSession/board/settings.gradle
new file mode 100644
index 0000000..311f804
--- /dev/null
+++ b/ms_session/SpringCRUDSession/board/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'board'
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/board/src/main/java/org/example/Main.java b/ms_session/SpringCRUDSession/board/src/main/java/org/example/Main.java
new file mode 100644
index 0000000..876719a
--- /dev/null
+++ b/ms_session/SpringCRUDSession/board/src/main/java/org/example/Main.java
@@ -0,0 +1,17 @@
+package org.example;
+
+//TIP 코드를 <b>실행</b>하려면 <shortcut actionId="Run"/>을(를) 누르거나
+// 에디터 여백에 있는 <icon src="AllIcons.Actions.Execute"/> 아이콘을 클릭하세요.
+public class Main {
+    public static void main(String[] args) {
+        //TIP 캐럿을 강조 표시된 텍스트에 놓고 <shortcut actionId="ShowIntentionActions"/>을(를) 누르면
+        // IntelliJ IDEA이(가) 수정을 제안하는 것을 확인할 수 있습니다.
+        System.out.printf("Hello and welcome!");
+
+        for (int i = 1; i <= 5; i++) {
+            //TIP <shortcut actionId="Debug"/>을(를) 눌러 코드 디버그를 시작하세요. 1개의 <icon src="AllIcons.Debugger.Db_set_breakpoint"/> 중단점을 설정해 드렸습니다
+            // 언제든 <shortcut actionId="ToggleLineBreakpoint"/>을(를) 눌러 중단점을 더 추가할 수 있습니다.
+            System.out.println("i = " + i);
+        }
+    }
+}
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/board/src/main/resources/application.yml b/ms_session/SpringCRUDSession/board/src/main/resources/application.yml
new file mode 100644
index 0000000..4733b81
--- /dev/null
+++ b/ms_session/SpringCRUDSession/board/src/main/resources/application.yml
@@ -0,0 +1,28 @@
+server:
+  port: 8080
+
+spring:
+  application:
+    name: session
+
+  datasource:
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    url: jdbc:mysql://localhost:3306/session?serverTimezone=Asia/Seoul&characterEncoding=UTF-8
+    username: root
+    password: yebin1448!
+
+  jpa:
+    hibernate:
+      ddl-auto: update
+    show-sql: true
+    properties:
+      hibernate:
+        format_sql: true
+
+  jackson:
+    serialization:
+      fail-on-empty-beans: false
+
+logging:
+  level:
+    org.hibernate.SQL: debug
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/build.gradle b/ms_session/SpringCRUDSession/build.gradle
new file mode 100644
index 0000000..915fb01
--- /dev/null
+++ b/ms_session/SpringCRUDSession/build.gradle
@@ -0,0 +1,44 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '4.0.4'
+	id 'io.spring.dependency-management' version '1.1.7'
+}
+
+group = 'com.likelion'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(21)
+	}
+}
+
+configurations {
+	compileOnly {
+		extendsFrom annotationProcessor
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'org.springframework.boot:spring-boot-starter-webmvc'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
+	implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.5.0'
+
+	compileOnly 'org.projectlombok:lombok'
+	developmentOnly 'org.springframework.boot:spring-boot-devtools'
+	runtimeOnly 'com.mysql:mysql-connector-j'
+	annotationProcessor 'org.springframework.boot:spring-boot-configuration-processor'
+	annotationProcessor 'org.projectlombok:lombok'
+	testImplementation 'org.springframework.boot:spring-boot-starter-data-jpa-test'
+	testImplementation 'org.springframework.boot:spring-boot-starter-webmvc-test'
+	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
diff --git a/ms_session/SpringCRUDSession/gradle/wrapper/gradle-wrapper.jar b/ms_session/SpringCRUDSession/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..d997cfc
Binary files /dev/null and b/ms_session/SpringCRUDSession/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/ms_session/SpringCRUDSession/gradle/wrapper/gradle-wrapper.properties b/ms_session/SpringCRUDSession/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..dbc3ce4
--- /dev/null
+++ b/ms_session/SpringCRUDSession/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/ms_session/SpringCRUDSession/gradlew b/ms_session/SpringCRUDSession/gradlew
new file mode 100644
index 0000000..0262dcb
--- /dev/null
+++ b/ms_session/SpringCRUDSession/gradlew
@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/b631911858264c0b6e4d6603d677ff5218766cee/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/ms_session/SpringCRUDSession/gradlew.bat b/ms_session/SpringCRUDSession/gradlew.bat
new file mode 100644
index 0000000..c4bdd3a
--- /dev/null
+++ b/ms_session/SpringCRUDSession/gradlew.bat
@@ -0,0 +1,93 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/ms_session/SpringCRUDSession/settings.gradle b/ms_session/SpringCRUDSession/settings.gradle
new file mode 100644
index 0000000..ade3347
--- /dev/null
+++ b/ms_session/SpringCRUDSession/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'session'
diff --git a/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/SessionApplication.java b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/SessionApplication.java
new file mode 100644
index 0000000..62fbda8
--- /dev/null
+++ b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/SessionApplication.java
@@ -0,0 +1,13 @@
+package com.likelion.session;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication //이 프로젝트를 실행하는 메인 설정 클래스라는 걸 알림.
+public class SessionApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SessionApplication.class, args);
+	}
+
+}
diff --git a/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/controller/BoardController.java b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/controller/BoardController.java
new file mode 100644
index 0000000..f1ad74f
--- /dev/null
+++ b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/controller/BoardController.java
@@ -0,0 +1,90 @@
+package com.likelion.session.controller;
+
+import com.likelion.session.dto.BoardCreateRequest;
+import com.likelion.session.dto.BoardResponse;
+import com.likelion.session.dto.BoardUpdateRequest;
+import com.likelion.session.service.BoardService;
+import io.swagger.v3.oas.annotations.Operation;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController //요청 받으면 JSON 같은 데이터만 반환하는 클래스
+@RequestMapping("/boards") //Spring Framework에서 “요청 URL 경로를 매핑(연결)하는 설정.
+                            // /boards"로 들어오는 요청을 이 컨트롤러(또는 메서드)가 처리하겠다는 뜻
+@RequiredArgsConstructor //필수 필드만 파라미터로 받는 생성자를 자동 생성
+public class BoardController {
+
+    private final BoardService boardService;
+
+    /*
+        게시글 생성
+
+        [요청 흐름]
+        Client
+        -> DispatcherServlet
+        -> HandlerMapping
+        -> BoardController의 create() 메서드 선택
+        -> Service 호출
+        -> Repository 호출
+        -> DB 저장
+        -> 결과 반환
+        -> JSON 응답
+     */
+    @Operation( //API의 기능과 설명을 문서화하기 위한 어노테이션
+            summary = "게시글 생성",
+            description = "새로운 게시글을 생성합니다."
+    )
+    @PostMapping //POST 요청을 처리해 데이터를 생성/전송하는 API 매핑 어노테이션
+    public ResponseEntity<BoardResponse> create(@RequestBody BoardCreateRequest request) {
+        BoardResponse response = boardService.create(request);
+        return ResponseEntity.ok(response);
+    }
+
+    // 게시글 전체 조회
+    @Operation( //API의 기능과 설명을 문서화하기 위한 어노테이션
+            summary = "게시글 전체 조회",
+            description = "등록된 모든 게시글을 조회합니다."
+    )
+    @GetMapping //GET 요청을 처리해 데이터를 조회하는 API 매핑 어노테이션
+    public ResponseEntity<List<BoardResponse>> findAll() {
+        List<BoardResponse> response = boardService.findAll();
+        return ResponseEntity.ok(response);
+    }
+
+    // 게시글 단건 조회
+    @Operation( //API의 기능과 설명을 문서화하기 위한 어노테이션
+            summary = "게시글 단건 조회",
+            description = "id로 특정 게시글을 조회합니다."
+    )
+    @GetMapping("/{id}") //URL의 id 값을 받아 해당 데이터를 조회하는 GET API 매핑
+    public ResponseEntity<BoardResponse> findById(@PathVariable Long id) {
+        BoardResponse response = boardService.findById(id);
+        return ResponseEntity.ok(response);
+    }
+
+    // 게시글 수정
+    @Operation( //API의 기능과 설명을 문서화하기 위한 어노테이션
+            summary = "게시글 수정",
+            description = "id로 특정 게시글의 제목과 내용을 수정합니다."
+    )
+    @PutMapping("/{id}") //URL의 id에 해당하는 데이터를 수정하는 PUT API 매핑
+    public ResponseEntity<BoardResponse> update(@PathVariable Long id,
+                                                @RequestBody BoardUpdateRequest request) {
+        BoardResponse response = boardService.update(id, request);
+        return ResponseEntity.ok(response);
+    }
+
+    // 게시글 삭제
+    @Operation( //API의 기능과 설명을 문서화하기 위한 어노테이션
+            summary = "게시글 삭제",
+            description = "id로 특정 게시글을 삭제합니다."
+    )
+    @DeleteMapping("/{id}") //URL의 id에 해당하는 데이터를 삭제하는 DELETE API 매핑
+    public ResponseEntity<Void> delete(@PathVariable Long id) {
+        boardService.delete(id);
+        return ResponseEntity.noContent().build();
+    }
+}
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/domain/Board.java b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/domain/Board.java
new file mode 100644
index 0000000..9ed1463
--- /dev/null
+++ b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/domain/Board.java
@@ -0,0 +1,65 @@
+package com.likelion.session.domain;
+
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.AllArgsConstructor;
+
+import java.time.LocalDateTime;
+
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@Entity //자바 객체를 DB 테이블로 매핑하는 표시
+@Table(name = "boards") //이 엔티티가 어떤 DB 테이블 이름과 매핑되는지 지정하는 역할. 이 클래스는 DB의 "boards" 테이블과 연결된다.
+@NoArgsConstructor(access = AccessLevel.PROTECTED) //외부에서는 못 쓰고, 내부/상속/JPA만 쓸 수 있는 기본 생성자 생성
+@AllArgsConstructor //모든 필드를 한 번에 초기화하는 생성자 생성
+public class Board {
+
+    @Id //데이터베이스에서 해당 엔티티의 기본키를 지정하는 어노테이션
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    // 게시글 제목
+    @Column(nullable = false, length = 100) //컬럼을 NULL 불가로 하고 최대 길이를 100으로 제한하는 매핑 설정
+    private String title;
+
+    // 게시글 내용
+    @Column(nullable = false, columnDefinition = "TEXT") //컬럼을 NULL 불가로 하고 DB 타입을 TEXT로 지정하는 매핑 설정
+    private String content;
+
+    // 작성자
+    @Column(nullable = false, length = 30) //컬럼을 NULL 불가로 하고 최대 길이를 30으로 제한하는 매핑 설정
+    private String writer;
+
+    // 생성 시간
+    @Column(nullable = false) //컬럼을 NULL 불가로 하는 매핑 설정
+    private LocalDateTime createdAt;
+
+    // 수정 시간
+    @Column(nullable = false) //컬럼을 NULL 불가로 하는 매핑 설정
+    private LocalDateTime updatedAt;
+
+
+    public Board(String title, String content, String writer) {
+        this.title = title;
+        this.content = content;
+        this.writer = writer;
+    }
+
+    @PrePers //엔티티가 저장되기 직전에 실행되는 메서드를 지정하는 어노테이션ist
+    public void prePersist() {
+        this.createdAt = LocalDateTime.now();
+        this.updatedAt = LocalDateTime.now();
+    }
+
+    @PreUpdate //엔티티가 수정되기 직전에 실행되는 메서드를 지정하는 어노테이션
+    public void preUpdate() {
+        this.updatedAt = LocalDateTime.now();
+    }
+
+
+    public void update(String title, String content) {
+        this.title = title;
+        this.content = content;
+    }
+}
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardCreateRequest.java b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardCreateRequest.java
new file mode 100644
index 0000000..a5c593a
--- /dev/null
+++ b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardCreateRequest.java
@@ -0,0 +1,16 @@
+package com.likelion.session.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@Setter //setter 메서드를 자동 생성해줌
+@NoArgsConstructor //매개변수가 없는 기본 생성자를 자동으로 만들어 줌
+@AllArgsConstructor //모든 필드를 매개변수로 받는 생성자를 자동으로 만들어줌
+public class BoardCreateRequest {
+    private String title;
+    private String content;
+    private String writer;
+}
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardResponse.java b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardResponse.java
new file mode 100644
index 0000000..cfcc606
--- /dev/null
+++ b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardResponse.java
@@ -0,0 +1,21 @@
+package com.likelion.session.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+
+import java.time.LocalDateTime;
+
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@AllArgsConstructor //모든 필드를 매개변수로 받는 생성자를 자동으로 만들어줌
+@Builder //객체를 빌더 패턴으로 생성할 수 있게 해주는 기능
+        //빌더 패턴: 복잡한 객체를 단계적으로 생성하는 디자인 패턴
+public class BoardResponse {
+
+    private Long id;
+    private String title;
+    private String content;
+    private String writer;
+    private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
+}
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java
new file mode 100644
index 0000000..8ccea30
--- /dev/null
+++ b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java
@@ -0,0 +1,22 @@
+package com.likelion.session.dto;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.Size;
+
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@Setter //setter 메서드를 자동 생성해줌
+@NoArgsConstructor //매개변수가 없는 기본 생성자를 자동으로 만들어 줌
+public class BoardUpdateRequest {
+    @NotBlank(message = "제목은 필수입니다.") //값이 비어있거나 공백이면 제목은 필수입니다.라는 메시지로 검증 실패를 발생시키는 어노테이션
+    @Size(max = 100, message = "제목은 100자 이하로 입력해주세요.") //값의 길이를 100자 이하로 제한하고 초과 시 해당 메시지로 검증 실패를 발생시키는 어노테이션
+    private String title;
+
+    @NotBlank(message = "내용은 필수입니다.") //값이 비어있거나 공백이면 내용은 필수입니다.라는 메시지로 검증 실패를 발생시키는 어노테이션
+    private String content;
+}
+
+
diff --git a/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/repository/BoardRepository.java b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/repository/BoardRepository.java
new file mode 100644
index 0000000..65a424d
--- /dev/null
+++ b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/repository/BoardRepository.java
@@ -0,0 +1,7 @@
+package com.likelion.session.repository;
+
+import com.likelion.session.domain.Board;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface BoardRepository extends JpaRepository<Board, Long> {
+}
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/service/BoardService.java b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/service/BoardService.java
new file mode 100644
index 0000000..071d729
--- /dev/null
+++ b/ms_session/SpringCRUDSession/src/main/java/com/likelion/session/service/BoardService.java
@@ -0,0 +1,122 @@
+package com.likelion.session.service;
+
+import com.likelion.session.domain.Board;
+import com.likelion.session.dto.BoardCreateRequest;
+import com.likelion.session.dto.BoardResponse;
+import com.likelion.session.dto.BoardUpdateRequest;
+import com.likelion.session.repository.BoardRepository;
+import org.springframework.transaction.annotation.Transactional;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Slf4j //로그 출력을 위한 log 객체를 자동으로 생성해주는 어노테이션
+@Service //이 클래스가 비즈니스 로직을 처리하는 클래스임을 스프링에게 알려줌.
+@RequiredArgsConstructor //final이 붙은 필드(boardRepository)를 생성자로 자동 주입해줌
+@Transactional //DB 작업 도중 에러가 나면 모든 작업을 이전으로 롤백함
+public class BoardService {
+
+    private final BoardRepository boardRepository;
+
+    /*
+        게시글 생성
+        - Controller가 넘겨준 요청 DTO를 받아서
+        - Entity로 바꾼 뒤
+        - Repository를 통해 DB에 저장
+        - 저장된 결과를 Response DTO로 변환해서 반환
+     */
+    public BoardResponse create(BoardCreateRequest request) {
+        Board board = new Board(
+                request.getTitle(),
+                request.getContent(),
+                request.getWriter()
+        );
+
+        Board savedBoard = boardRepository.save(board);
+
+        return BoardResponse.builder()
+                .id(savedBoard.getId())
+                .title(savedBoard.getTitle())
+                .content(savedBoard.getContent())
+                .writer(savedBoard.getWriter())
+                .createdAt(savedBoard.getCreatedAt())
+                .updatedAt(savedBoard.getUpdatedAt())
+                .build();
+    }
+
+    /*
+        게시글 전체 조회
+        - DB에 있는 모든 게시글을 가져옴
+        - Entity 리스트를 Response DTO 리스트로 변환
+     */
+    @Transactional(readOnly = true) //조회만 한다는 뜻.
+    public List<BoardResponse> findAll() {
+        return boardRepository.findAll()
+                .stream()
+                .map(board -> BoardResponse.builder()
+                        .id(board.getId())
+                        .title(board.getTitle())
+                        .content(board.getContent())
+                        .writer(board.getWriter())
+                        .createdAt(board.getCreatedAt())
+                        .updatedAt(board.getUpdatedAt())
+                        .build())
+                .toList();
+    }
+
+    /*
+        게시글 단건 조회
+        - id로 게시글 조회
+        - 없으면 예외 발생
+     */
+    @Transactional(readOnly = true) //조회만 한다는 뜻.
+    public BoardResponse findById(Long id) {
+        Board board = boardRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("해당 게시글이 없습니다. id=" + id));
+
+        return BoardResponse.builder()
+                .id(board.getId())
+                .title(board.getTitle())
+                .content(board.getContent())
+                .writer(board.getWriter())
+                .createdAt(board.getCreatedAt())
+                .updatedAt(board.getUpdatedAt())
+                .build();
+    }
+
+    /*
+        게시글 수정
+        - 기존 게시글을 찾음
+        - 엔티티의 update 메서드로 값 변경
+        - JPA 변경 감지로 update 반영
+     */
+    public BoardResponse update(Long id, BoardUpdateRequest request) {
+        Board board = boardRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("해당 게시글이 없습니다. id=" + id));
+
+        board.update(request.getTitle(), request.getContent());
+
+        return BoardResponse.builder()
+                .id(board.getId())
+                .title(board.getTitle())
+                .content(board.getContent())
+                .writer(board.getWriter())
+                .createdAt(board.getCreatedAt())
+                .updatedAt(board.getUpdatedAt())
+                .build();
+    }
+
+    /*
+        게시글 삭제
+        - id로 게시글을 찾고
+        - 있으면 삭제
+     */
+    public void delete(Long id) {
+        Board board = boardRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("해당 게시글이 없습니다. id=" + id));
+
+        boardRepository.delete(board);
+    }
+}
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/src/main/resources/application.yml b/ms_session/SpringCRUDSession/src/main/resources/application.yml
new file mode 100644
index 0000000..6255e3d
--- /dev/null
+++ b/ms_session/SpringCRUDSession/src/main/resources/application.yml
@@ -0,0 +1,28 @@
+server:
+  port: 8082
+
+spring:
+  application:
+    name: session
+
+  datasource:
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    url: jdbc:mysql://localhost:3306/session?serverTimezone=Asia/Seoul&characterEncoding=UTF-8
+    username: root
+    password: dami0819!
+
+  jpa:
+    hibernate:
+      ddl-auto: update
+    show-sql: true
+    properties:
+      hibernate:
+        format_sql: true
+
+  jackson:
+    serialization:
+      fail-on-empty-beans: false
+
+logging:
+  level:
+    org.hibernate.SQL: debug
\ No newline at end of file
diff --git a/ms_session/SpringCRUDSession/src/test/java/com/likelion/session/SessionApplicationTests.java b/ms_session/SpringCRUDSession/src/test/java/com/likelion/session/SessionApplicationTests.java
new file mode 100644
index 0000000..f4185b3
--- /dev/null
+++ b/ms_session/SpringCRUDSession/src/test/java/com/likelion/session/SessionApplicationTests.java
@@ -0,0 +1,13 @@
+package com.likelion.session;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest //실제 서버처럼 스프링 환경을 다 켜고 테스트하는 것
+class SessionApplicationTests {
+
+	@Test //해당 메서드를 테스트 코드로 실행하도록 지정하는 어노테이션
+	void contextLoads() {
+	}
+
+}
diff --git a/src/main/java/com/likelion/session/SessionApplication.java b/src/main/java/com/likelion/session/SessionApplication.java
index 658e562..64dda82 100644
--- a/src/main/java/com/likelion/session/SessionApplication.java
+++ b/src/main/java/com/likelion/session/SessionApplication.java
@@ -3,7 +3,7 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
-@SpringBootApplication
+@SpringBootApplication //Spring Boot 애플리케이션의 시작점이며 설정·컴포넌트 스캔을 한 번에 처리하는 핵심 어노테이션
 public class SessionApplication {
 
 	public static void main(String[] args) {
diff --git a/src/main/java/com/likelion/session/controller/BoardController.java b/src/main/java/com/likelion/session/controller/BoardController.java
index 2af74e7..084a1c2 100644
--- a/src/main/java/com/likelion/session/controller/BoardController.java
+++ b/src/main/java/com/likelion/session/controller/BoardController.java
@@ -11,12 +11,14 @@
 
 import java.util.List;
 
-@RestController
-@RequestMapping("/boards")
-@RequiredArgsConstructor
+@RestController //요청 받으면 JSON 같은 데이터만 반환하는 클래스
+@RequestMapping("/boards") //Spring Framework에서 “요청 URL 경로를 매핑(연결)하는 설정.
+// /boards"로 들어오는 요청을 이 컨트롤러(또는 메서드)가 처리하겠다는 뜻
+@RequiredArgsConstructor //필수 필드만 파라미터로 받는 생성자를 자동 생성
+
 public class BoardController {
 
-    private final ;
+    private final BoardService boardService;
 
     /*
         게시글 생성
@@ -32,44 +34,44 @@ public class BoardController {
         -> 결과 반환
         -> JSON 응답
      */
-    @Operation(
+    @Operation( //이 API가 뭔지 설명해주는 주석
             summary = "게시글 생성",
             description = "새로운 게시글을 생성합니다."
     )
-    @
+    @PostMapping //POST 요청을 받아서 데이터를 생성/처리하는 API 연결 어노테이션
     public ResponseEntity<BoardResponse> create(@RequestBody BoardCreateRequest request) {
         BoardResponse response = boardService.create(request);
         return ResponseEntity.ok(response);
     }
 
     // 게시글 전체 조회
-    @Operation(
+    @Operation( //이 API가 뭔지 설명해주는 주석
             summary = "게시글 전체 조회",
             description = "등록된 모든 게시글을 조회합니다."
     )
-    @
+    @GetMapping //GET 요청을 받아서 데이터를 조회하는 API 연결 어노테이션
     public ResponseEntity<List<BoardResponse>> findAll() {
         List<BoardResponse> response = boardService.findAll();
         return ResponseEntity.ok(response);
     }
 
     // 게시글 단건 조회
-    @Operation(
+    @Operation( //이 API가 뭔지 설명해주는 주석
             summary = "게시글 단건 조회",
             description = "id로 특정 게시글을 조회합니다."
     )
-    @GetMapping("/{id}")
+    @GetMapping("/{id}") //URL 경로에 있는 id 값을 받아 해당 데이터를 조회하는 GET API 매핑
     public ResponseEntity<BoardResponse> findById(@PathVariable Long id) {
         BoardResponse response = boardService.findById(id);
         return ResponseEntity.ok(response);
     }
 
     // 게시글 수정
-    @Operation(
+    @Operation( //이 API가 뭔지 설명해주는 주석
             summary = "게시글 수정",
             description = "id로 특정 게시글의 제목과 내용을 수정합니다."
     )
-    @("/{id}")
+    @PutMapping("/{id}") //URL의 id에 해당하는 데이터를 수정하는 PUT API 매핑
     public ResponseEntity<BoardResponse> update(@PathVariable Long id,
                                                 @RequestBody BoardUpdateRequest request) {
         BoardResponse response = boardService.update(id, request);
@@ -77,11 +79,11 @@ public ResponseEntity<BoardResponse> update(@PathVariable Long id,
     }
 
     // 게시글 삭제
-    @Operation(
+    @Operation( //이 API가 뭔지 설명해주는 주석
             summary = "게시글 삭제",
             description = "id로 특정 게시글을 삭제합니다."
     )
-    @("/{id}")
+    @DeleteMapping("/{id}") //URL의 id에 해당하는 데이터를 삭제하는 DELETE API 매핑
     public ResponseEntity<Void> delete(@PathVariable Long id) {
         boardService.delete(id);
         return ResponseEntity.noContent().build();
diff --git a/src/main/java/com/likelion/session/domain/Board.java b/src/main/java/com/likelion/session/domain/Board.java
index cb873de..d1b15ed 100644
--- a/src/main/java/com/likelion/session/domain/Board.java
+++ b/src/main/java/com/likelion/session/domain/Board.java
@@ -8,36 +8,37 @@
 
 import java.time.LocalDateTime;
 
-@Getter // getter 메서드 자동 생성
-@Entity // 해당 클래스 DB 테이블로 인식하고 관리
-@Table(name = "boards")
-@NoArgsConstructor(access = AccessLevel.PROTECTED)
-@AllArgsConstructor
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@Entity //자바 객체를 DB 테이블로 매핑하는 표시
+@Table(name = "boards") //이 엔티티가 어떤 DB 테이블 이름과 매핑되는지 지정하는 역할. 이 클래스는 DB의 "boards" 테이블과 연결된다.
+@NoArgsConstructor(access = AccessLevel.PROTECTED) //외부에서는 못 쓰고, 내부/상속/JPA만 쓸 수 있는 기본 생성자 생성
+@AllArgsConstructor //모든 필드를 한 번에 초기화하는 생성자 생성
+
 public class Board {
 
-    @Id
-    @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private Long ;
+    @Id //데이터베이스에서 해당 엔티티의 기본키를 지정하는 어노테이션
+    @GeneratedValue(strategy = GenerationType.IDENTITY) //기본키 값을 DB가 자동으로 증가해서 생성하도록 설정하는 어노테이션
+    private Long id;
 
     // 게시글 제목
-    @Column(nullable = false, length = 100)
-    private String ;
+    @Column(nullable = false, length = 100) //엔티티 필드를 데이터베이스 컬럼과 매핑하는 어노테이션
+    private String title;
 
     // 게시글 내용
-    @Column(nullable = false, columnDefinition = "TEXT")
-    private String ;
+    @Column(nullable = false, columnDefinition = "TEXT") //엔티티 필드를 데이터베이스 컬럼과 매핑하는 어노테이션
+    private String content;
 
     // 작성자
-    @Column(nullable = false, length = 30)
-    private String ;
+    @Column(nullable = false, length = 30) //엔티티 필드를 데이터베이스 컬럼과 매핑하는 어노테이션
+    private String writer;
 
     // 생성 시간
-    @Column(nullable = false)
-    private LocalDateTime ;
+    @Column(nullable = false) //엔티티 필드를 데이터베이스 컬럼과 매핑하는 어노테이션
+    private LocalDateTime createdAt;
 
     // 수정 시간
-    @Column(nullable = false)
-    private LocalDateTime ;
+    @Column(nullable = false) //엔티티 필드를 데이터베이스 컬럼과 매핑하는 어노테이션
+    private LocalDateTime updatedAt;
 
 
     public Board(String title, String content, String writer) {
@@ -46,13 +47,13 @@ public Board(String title, String content, String writer) {
         this.writer = writer;
     }
 
-    @PrePersist
+    @PrePersist //엔티티가 DB에 저장되기 전에 실행되는 메서드를 지정하는 어노테이션
     public void prePersist() {
         this.createdAt = LocalDateTime.now();
         this.updatedAt = LocalDateTime.now();
     }
 
-    @PreUpdate
+    @PreUpdate //엔티티가 DB에서 수정되기 전에 실행되는 메서드를 지정하는 어노테이션
     public void preUpdate() {
         this.updatedAt = LocalDateTime.now();
     }
diff --git a/src/main/java/com/likelion/session/dto/BoardCreateRequest.java b/src/main/java/com/likelion/session/dto/BoardCreateRequest.java
index 62b1821..f871bbe 100644
--- a/src/main/java/com/likelion/session/dto/BoardCreateRequest.java
+++ b/src/main/java/com/likelion/session/dto/BoardCreateRequest.java
@@ -5,13 +5,13 @@
 import lombok.NoArgsConstructor;
 import lombok.Setter;
 
-@Getter
-@Setter
-@NoArgsConstructor
-@AllArgsConstructor
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@Setter //setter 메서드를 자동 생성해줌
+@NoArgsConstructor //매개변수가 없는 기본 생성자를 자동으로 만들어 줌
+@AllArgsConstructor //모든 필드를 매개변수로 받는 생성자를 자동으로 만들어줌
+
 public class BoardCreateRequest {
-    // 넘겨주고 싶은 정보: 제목(title), 내용(content), 작성자(writer)
-    private String ;
-    private String ;
-    private String ;
+    private String title;
+    private String content;
+    private String writer;
 }
\ No newline at end of file
diff --git a/src/main/java/com/likelion/session/dto/BoardResponse.java b/src/main/java/com/likelion/session/dto/BoardResponse.java
index dc6e74f..4e7fcd2 100644
--- a/src/main/java/com/likelion/session/dto/BoardResponse.java
+++ b/src/main/java/com/likelion/session/dto/BoardResponse.java
@@ -6,12 +6,13 @@
 
 import java.time.LocalDateTime;
 
-@Getter
-@AllArgsConstructor
-@Builder
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@AllArgsConstructor //모든 필드를 매개변수로 받는 생성자를 자동으로 만들어줌
+@Builder //객체를 빌더 패턴으로 생성할 수 있게 해주는 기능
+//빌더 패턴: 복잡한 객체를 단계적으로 생성하는 디자인 패턴
+
 public class BoardResponse {
 
-    // 돌려주고 싶은 응답: id, title, content, writer, createdAt, updatedAt
     private Long id;
     private String title;
     private String content;
diff --git a/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java b/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java
index d1e98e4..14b5796 100644
--- a/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java
+++ b/src/main/java/com/likelion/session/dto/BoardUpdateRequest.java
@@ -7,15 +7,15 @@
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.Size;
 
-@Getter
-@Setter
-@NoArgsConstructor
+@Getter //필드 값을 읽는 getter 메서드를 자동으로 생성해줌
+@Setter //setter 메서드를 자동 생성해줌
+@NoArgsConstructor //매개변수가 없는 기본 생성자를 자동으로 만들어 줌
 public class BoardUpdateRequest {
-    @NotBlank(message = "제목은 필수입니다.")
-    @Size(max = 100, message = "제목은 100자 이하로 입력해주세요.")
+    @NotBlank(message = "제목은 필수입니다.") //문자열이 null이 아니고 공백이 아닌 값이어야 함을 검증하는 어노테이션
+    @Size(max = 100, message = "제목은 100자 이하로 입력해주세요.") //문자열이나 컬렉션의 길이(크기)를 제한하는 검증 어노테이션
     private String title;
 
-    @NotBlank(message = "내용은 필수입니다.")
+    @NotBlank(message = "내용은 필수입니다.") //문자열이 null이 아니고 공백이 아닌 값이어야 함을 검증하는 어노테이션
     private String content;
 }
 
diff --git a/src/main/java/com/likelion/session/service/BoardService.java b/src/main/java/com/likelion/session/service/BoardService.java
index 1bc58af..6b79fc2 100644
--- a/src/main/java/com/likelion/session/service/BoardService.java
+++ b/src/main/java/com/likelion/session/service/BoardService.java
@@ -12,13 +12,14 @@
 
 import java.util.List;
 
-@Slf4j
-@Service
-@RequiredArgsConstructor
-@Transactional
+@Slf4j //로그 출력을 위한 log 객체를 자동으로 생성해주는 어노테이션
+@Service //이 클래스가 비즈니스 로직을 처리하는 클래스임을 스프링에게 알려줌.
+@RequiredArgsConstructor //final이 붙은 필드(boardRepository)를 생성자로 자동 주입해줌
+@Transactional //DB 작업 도중 에러가 나면 모든 작업을 이전으로 롤백함
+
 public class BoardService {
 
-    private final ;
+    private final BoardRepository boardRepository;
 
     /*
         게시글 생성
@@ -51,7 +52,7 @@ public BoardResponse create(BoardCreateRequest request) {
         - DB에 있는 모든 게시글을 가져옴
         - Entity 리스트를 Response DTO 리스트로 변환
      */
-    @Transactional(readOnly = true)
+    @Transactional(readOnly = true) //해당 메서드/클래스의 작업을 하나의 트랜잭션으로 묶어 모두 성공하거나 모두 롤백되도록 하는 어노테이션
     public List<BoardResponse> findAll() {
         return boardRepository.findAll()
                 .stream()
@@ -71,7 +72,7 @@ public List<BoardResponse> findAll() {
         - id로 게시글 조회
         - 없으면 예외 발생
      */
-    @Transactional(readOnly = true)
+    @Transactional(readOnly = true) //해당 메서드/클래스의 작업을 하나의 트랜잭션으로 묶어 모두 성공하거나 모두 롤백되도록 하는 어노테이션
     public BoardResponse findById(Long id) {
         Board board = boardRepository.findById(id)
                 .orElseThrow(() -> new IllegalArgumentException("해당 게시글이 없습니다. id=" + id));
diff --git a/src/test/java/com/likelion/session/SessionApplicationTests.java b/src/test/java/com/likelion/session/SessionApplicationTests.java
index b65f4a0..f4185b3 100644
--- a/src/test/java/com/likelion/session/SessionApplicationTests.java
+++ b/src/test/java/com/likelion/session/SessionApplicationTests.java
@@ -3,10 +3,10 @@
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 
-@SpringBootTest
+@SpringBootTest //실제 서버처럼 스프링 환경을 다 켜고 테스트하는 것
 class SessionApplicationTests {
 
-	@Test
+	@Test //해당 메서드를 테스트 코드로 실행하도록 지정하는 어노테이션
 	void contextLoads() {
 	}