Code-review 1

@Entity
@Getter
@Setter
@NoArgsConstructor
public class User {

    @Id
    @GeneratedValue
    private Long id;

    private String name;
}

@Service
public class UserService {

    @Autowired
    private UserRepository userRepository;

    @Transactional
    public void changeName(long id, String name) {
        User user = userRepository.getById(id);
        user.setName(name);

        if (StringUtils.isNotEmpty(name)) {
            userRepository.save(user);
        }
    }
}