java – 在HATEOAS _embedded PagedResource中命名Spring页面键

我们目前正在最新的项目中实现API库.
我们正在尝试将Spring HATEOAS与HAL一起用作生成json hal响应的适当库.

使用Spring引导1.2.5.RELEASE提供的Spring HATEOAS版本.
目前,我们正在将要返回的实际JPA实体映射为Resources.

即我们的实体看起来像这样：

import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
@Entity
@Table(name = "users")
public class User {

    @Id
    private UUID id;

    @Column(nullable = false, length = 70)
    private String firstName;

    @Column(nullable = false, length = 70)
    private String lastName;
}

我们的仓库：

public interface UserRepository extends PagingAndSortingRepository<User, UUID>, JpaSpecificationExecutor<User> {
    User findByUsername(String username);
}

我们的服务：

@Service
@Transactional
public class UserService implements UserDetailsService {

    private UserRepository userRepository;

    @Autowired
    public UserService(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

    @Transactional
    public Page<User> findAll(Pageable pageable) {
        return this.userRepository.findAll(pageable);
    }
}

RestController：

@RestController
@RequestMapping(value = "/users", produces =MediaType.APPLICATION_JSON_VALUE) // this is done otherwise objectmapper returns xml for some reason
public UserRestController {

    public UserService userService;
    public EntityLinks entityLinks;

    @Autowired
    public UserRestController(UserService userService, EntityLinks entityLinks) {
        this.userService = userService;
        this.entityLinks = entityLinks;
    }

    @RequestMapping(method = RequestMethod.GET)
    public PagedResource<Resource<User>> getUsers(Pageable pageable, PagedResourcesAssembler<User> pagedResourcesAssembler) {
        Page<User> userPage = this.userService.findAll(pageable);

        PagedResources<Resource<User>> userPagedResources =
            pagedResourcesAssembler.toResource(
                    usersPage,
                    linkTo(methodOn(UserRestController.class).showUsers(pageable, pagedResourcesAssembler)).withSelfRel());

        return userPagedResources;

    }
}

假设我将默认页面大小设置为1,页面正在适当地生成.将链接设置为上一页/下一页.正在生成’embeddable’属性,但我们在第一页获得“userList”：[{user}],第二页获取“user $$_ jvst163_9List”：[{user}].

有没有办法实际命名页面列表属性(我一直试图在网上找到一些东西,但无济于事).

例如：

{
  "_links": {
    "self": {
      "href": "http://localhost:8080/users{?page,size,sort}",
      "templated": true
    },
    "next": {
      "href": "http://localhost:8080/users?page=1&size=1&sort=firstname,lastname,asc"
    }
  },
  "_embedded": {
    "userList": [{
      "id": "2027bea9-cfdc-4724-b29c-39b3f64cbfd5",
      "firstname": "admin",
      "lastname": "asdf",
    }]
  },
  "page": {
    "size": 1,
    "totalElements": 2,
    "totalPages": 2,
    "number": 0
  }
}
{
  "_links": {
    "self": {
      "href": "http://localhost:8080/users{?page,size,sort}",
      "templated": true
    },
    "prev": {
      "href": "http://localhost:8080/users?page=0&size=1&sort=firstname,lastname,asc"
    }
  },
  "_embedded": {
    "user_$$_jvst163_9List": [{
      "id": "52c0c09e-c386-4aec-9723-f8beaf99adc5",
      "username": "admin",,
      "firstname": "firstname",
      "lastname": "lastname"
    }]
  },
  "page": {
    "size": 1,
    "totalElements": 2,
    "totalPages": 2,
    "number": 1
  }
}

解决方法:

据我了解作者自己对该问题的评论,找到的解决方案是将@Relation(collectionRelation =“users”)添加到User类.

...
@Table(name = "users")
@Relation(collectionRelation = "users")
public class User {
...

标签：java,spring,spring-boot,spring-hateoas
来源： https://codeday.me/bug/20190824/1708430.html