@Table(name = "user")
public class User {
@Id
private Long id;
private String name;
private Integer age;
}
@Service
public class UserService {
@Autowired
private EntityManager em;
public User getUserById(Long id) {
return em.get(User.class, id);
}
public void saveUser(User user) {
em.persist(user);
}
}
