如何在Spring JPA中仅使用对象的某些部分编写查询

public interface CustomProjection {
    String getName();
    int getAge();
}

@Repository
public interface UserRepository extends JpaRepository<User, Long> {

    @Query("SELECT u.name AS name, u.age AS age FROM User u WHERE u.id = :id")
    CustomProjection findUserProjectionById(@Param("id") Long id);
}

@Service
public class UserService {

    @Autowired
    private UserRepository userRepository;

    public CustomProjection getUserProjectionById(Long id) {
        return userRepository.findUserProjectionById(id);
    }
}