如何在spring boot中从postgresql获得正确的Json响应？

<dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
</dependency>

spring.datasource.url=jdbc:postgresql://localhost:5432/db_name
spring.datasource.username=username
spring.datasource.password=password

@Entity
@Table(name = "users")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "name")
    private String name;

    // getters and setters
}

@Repository
public interface UserRepository extends JpaRepository<User, Long> {
    // 添加自定义的查询方法
}

@RestController
@RequestMapping("/users")
public class UserController {
    @Autowired
    private UserRepository userRepository;

    @GetMapping
    public ResponseEntity<List<User>> getUsers() {
        List<User> users = userRepository.findAll();
        return ResponseEntity.ok(users);
    }

    // 其他请求处理方法
}