TodoController2.java

@RestController
@RequestMapping("/todos")
public class TodoController {

    @Autowired
    private TodoService todoService;

    @GetMapping
    public ResponseEntity<?> getAll() {
        List<TodoDto> todos = todoService.findAll();
        if (todos == null || todos.isEmpty()) {
            return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
        }
        return ResponseEntity.ok(todos);
    }

    @GetMapping("/{id}")
    public ResponseEntity<?> getById(@PathVariable Long id) {
        TodoDto dto = todoService.findById(id);
        if (dto == null) {
            return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
        }
        return ResponseEntity.ok(dto);
    }

    @PostMapping
    public ResponseEntity<?> create(@RequestBody TodoDto todoDto) {
        Long id = todoService.save(todoDto);
        URI location = ServletUriComponentsBuilder.fromCurrentRequest()
                .path("/{id}").buildAndExpand(id).toUri();
        return ResponseEntity.created(location).build();
    }

    @PutMapping("/{id}")
    public ResponseEntity<?> update(@PathVariable Long id, @RequestBody TodoDto todoDto) {
        TodoDto dto = todoService.findById(id);
        if (dto == null) {
            return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
        }
        todoDto.setId(id);
        todoService.update(todoDto);
        return ResponseEntity.ok().build();
    }

    @DeleteMapping("/{id}")
    public ResponseEntity<?> delete(@PathVariable Long id) {
        todoService.delete(id);
        return ResponseEntity.ok().build();
    }

}