在Springboot JPA中对不同表使用restapi和store Json响应？

@Entity
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private String email;
    // getters and setters
}

public interface UserRepository extends JpaRepository<User, Long> {
}

@RestController
@RequestMapping("/api/users")
public class UserController {

    @Autowired
    private UserRepository userRepository;

    @GetMapping
    public List<User> getAllUsers() {
        return userRepository.findAll();
    }

    @PostMapping
    public User createUser(@RequestBody User user) {
        return userRepository.save(user);
    }

    @GetMapping("/{id}")
    public ResponseEntity<User> getUserById(@PathVariable Long id) {
        Optional<User> user = userRepository.findById(id);
        return user.map(ResponseEntity::ok).orElseGet(() -> ResponseEntity.notFound().build());
    }

    @PutMapping("/{id}")
    public ResponseEntity<User> updateUser(@PathVariable Long id, @RequestBody User userDetails) {
        Optional<User> optionalUser = userRepository.findById(id);
        if (optionalUser.isPresent()) {
            User user = optionalUser.get();
            user.setName(userDetails.getName());
            user.setEmail(userDetails.getEmail());
            User updatedUser = userRepository.save(user);
            return ResponseEntity.ok(updatedUser);
        } else {
            return ResponseEntity.notFound().build();
        }
    }

    @DeleteMapping("/{id}")
    public ResponseEntity<?> deleteUser(@PathVariable Long id) {
        Optional<User> user = userRepository.findById(id);
        if (user.isPresent()) {
            userRepository.deleteById(id);
            return ResponseEntity.ok().build();
        } else {
            return ResponseEntity.notFound().build();
        }
    }
}