当包含spring数据其余部分时，spring以纯JSON而非HAL格式返回Resource [英] Spring returns Resource in pure JSON not in HAL Format when including spring data rest

问题描述

当我将默认控制器用于我的实体时，Spring Data Rest提供了一切，一切正常.输出看起来像这样:

When I use the default controller for my Entities, provided by Spring Data Rest everything works like it should. The output looks like this:

{
  "_links" : {
    "search" : {
      "href" : "http://localhost:8080/users/search"
    }
  },
  "_embedded" : {
    "users" : [ {
      "firstName" : "Max",
      "lastName" : "Mustermann",
      "email" : "[e-mail]",
      "_links" : {
        "self" : {
          "href" : "http://localhost:8080/users/myadmin"
        }
      }
    } ]
  }
}

但是，如果我使用自己的控制器，输出将如下所示:

But if I use my own Controller the output looks like this:

[ {
  "firstName" : "Max",
  "lastName" : "Mustermann",
  "email" : "[e-mail]",
  "links" : [ {
    "rel" : "self",
    "href" : "http://localhost:8080/user/myadmin"
  } ]
} ]

我的控制器

@RestController
@RequestMapping("/user")
@EnableHypermediaSupport(type = {HypermediaType.HAL})
public class UserController {

    @Autowired
    UserRepository userRepository;

    @RequestMapping(method=RequestMethod.GET)
    public HttpEntity<List<User>> getUsers(){
        ArrayList<User> users = Lists.newArrayList(userRepository.findAll());
        for(User user : users){
            user.add(linkTo(methodOn(UserController.class).getUser(user.getUsername())).withSelfRel());
        }
        return new ResponseEntity<List<User>>(users, HttpStatus.OK);
    }

    @RequestMapping(value="/{username}", method= RequestMethod.GET)
    public HttpEntity<User> getUser(@PathVariable String username){
        User user = userRepository.findByUsername(username);
        user.add(linkTo(methodOn(UserController.class).getUser(user.getUsername())).withSelfRel());
        return new ResponseEntity<User>(user, HttpStatus.OK);
    }
}

我的用户:

@Entity
@Table(name="users")
public class User extends ResourceSupport{
    @Id
    private String username;

    private String firstName;
    private String lastName;

    @JsonIgnore
    private boolean enabled;

    @JsonIgnore
    private String password;

    @Column(unique =  true)
    private String email;

    public User(){
        enabled = false;
    }
    //Getters and Setters
}

如果我删除spring数据剩余依赖项并包含spring-hateoas，spring-plugin-core和json-path(com.jayway.jsonpath)，则它起作用.实体

if i delete the spring data rest dependency and include spring-hateoas, spring-plugin-core and json-path (com.jayway.jsonpath) it works.. But i want to use spring-data-rest for some other entities

两个问题:

1. 为什么不包含默认的带有弹簧数据其余部分的HAL?
2. 如何将HAL设置为输出格式

推荐答案

您需要返回ResourceSupport的子类型(通常为Resource或Resources)，以使HAL Jackson转换器启动.

You need to return a subtype of ResourceSupport (usually Resource or Resources) to let the HAL Jackson converter kick in.

此外，@EnableHypermediaSupport必须在JavaConfig配置类上使用，而不是在控制器上使用.

Also, @EnableHypermediaSupport has to be used on a JavaConfig configuration class, not the controller.

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