Controller Layer (@RestController)

Building a REST Controller

@RestController
@RequestMapping("/api/v1/users")
public class UserController {

    private final UserService userService;

    public UserController(UserService userService) {
        this.userService = userService;
    }

    @GetMapping("/{id}")
    public ResponseEntity<UserDto> getUserById(@PathVariable Long id) {
        UserDto user = userService.getUserById(id);
        return ResponseEntity.ok(user);
    }
}