<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.4.RELEASE</version>
</dependency>
@Controller
@RequestMapping("/users")
public class UserController {
@GetMapping("/{id}")
public ResponseEntity<User> getUserById(@PathVariable int id) {
User user = userService.getUserById(id);
if (user != null) {
return ResponseEntity.ok(user);
} else {
return ResponseEntity.notFound().build();
}
}
@PostMapping
public ResponseEntity<User> createUser(@RequestBody User user) {
User newUser = userService.createUser(user);
return ResponseEntity.created(URI.create("/users/" + newUser.getId())).body(newUser);
}
@PutMapping("/{id}")
public ResponseEntity<User> updateUser(@PathVariable int id, @RequestBody User user) {
User updatedUser = userService.updateUser(id, user);
if (updatedUser != null) {
return ResponseEntity.ok(updatedUser);
} else {
return ResponseEntity.notFound().build();
}
}
@DeleteMapping("/{id}")
public ResponseEntity<Void> deleteUser(@PathVariable int id) {
boolean result = userService.deleteUser(id);
if (result) {
return ResponseEntity.noContent().build();
} else {
return ResponseEntity.notFound().build();
}
}
}
@Service
public class UserService {
public User getUserById(int id) {
}
public User createUser(User user) {
}
public User updateUser(int id, User user) {
}
public boolean deleteUser(int id) {
}
}
