ADD: Get student by id method. Learning PR.

Spring-Boot-REST-API/src/main/java/com/wasim/rest/api/controller/StudentController.java

@@ -1,18 +1,12 @@
 package com.wasim.rest.api.controller;
 
 import java.util.List;
+import java.util.Optional;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.DeleteMapping;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PathVariable;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.PutMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 import com.wasim.rest.api.entity.Student;
 import com.wasim.rest.api.service.StudentService;
@@ -35,9 +29,14 @@ public ResponseEntity<List<Student>> getAllStudent(){
 
 		return new ResponseEntity<List<Student>>(studentService.getAllStudent(), HttpStatus.OK);
 	}
+
+	@GetMapping("/getStudent/{id}")
+	public ResponseEntity<Student> getStudentById(@PathVariable long id){
+		return new ResponseEntity<Student>(studentService.getStudentById(id), HttpStatus.OK);
+	}
 
 	@PutMapping("/editStudent/{id}")
-	public ResponseEntity<Student> updateStudent(@PathVariable("id") long id, @RequestBody Student student){
+	public ResponseEntity<Student> updateStudent(@PathVariable long id, @RequestBody Student student){
 		return new ResponseEntity<Student>(studentService.updateStudent(id, student), HttpStatus.OK);
 	}
 

Spring-Boot-REST-API/src/main/java/com/wasim/rest/api/repository/StudentRepository.java

@@ -6,4 +6,6 @@
 
 public interface StudentRepository extends JpaRepository<Student, Long>{
 
+    Student getStudentById(long id);
+
 }

Spring-Boot-REST-API/src/main/java/com/wasim/rest/api/service/StudentService.java

@@ -7,9 +7,11 @@
 public interface StudentService {
 
 	public Student createStudent(Student student);
-	
+
 	public List<Student> getAllStudent();
-
+
+	public Student getStudentById(long id);
+
 	public Student updateStudent(long id, Student student);
 
 	public void deleteStudent(long id);

Spring-Boot-REST-API/src/main/java/com/wasim/rest/api/service/StudentServiceImpl.java

@@ -25,6 +25,11 @@ public List<Student> getAllStudent() {
 		return studentRepository.findAll();
 	}
 
+	@Override
+	public Student getStudentById(long id){
+		return studentRepository.getStudentById(id);
+	}
+
 	@Override
 	public Student updateStudent(long id, Student student) {
 		student.setId(id);