Question

我想在下面返回json。

{ “名字”：“杰基” }

邮递员给我错误。说明

意外的'n'

这里是春季靴子的新手。 1天大。有没有正确的方法来做到这一点？

   // post method here
    @RequestMapping(method = RequestMethod.POST , produces = "application/json")
    ResponseEntity<?> addTopic(@RequestBody Topic topic) {

        if (Util.save(topicRepository, new Topic(topic.getTopicName(), topic.getQuestionCount())) != null) {
            return Util.createResponseEntity("Name : jackie", HttpStatus.CREATED);
        }
        return Util.createResponseEntity("Error creating resource", HttpStatus.BAD_REQUEST);
    }

Answer 1

在该模型中创建模型和存储值，并从控制器返回模型。检查下面的代码。

class User{
     private String name;
     //getter and setter
}


 @RequestMapping(method = RequestMethod.POST , produces = "application/json")
    ResponseEntity<User> addTopic(@RequestBody Topic topic) {
          User user=new User();
          user.setName("myname");
           HttpHeaders httpHeaders = new HttpHeaders();
          return new ResponseEntity<User>(user, httpHeaders, HttpStatus.CREATED);   
    }

Answer 2

尝试将回复包装在对象中。

class Response implements Serializable {
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

Controller可以是这样的：

@RequestMapping(method = RequestMethod.POST , produces = "application/json")
ResponseEntity<?> addTopic(@RequestBody Topic topic) {

    if (Util.save(topicRepository, new Topic(topic.getTopicName(), topic.getQuestionCount())) != null) {
        Response response = new Response();
        response.setName("jackie");
        return new ResponseEntity<>(response, HttpStatus.CREATED);
    }
    return Util.createResponseEntity("Error creating resource", HttpStatus.BAD_REQUEST);
}

Answer 3

这是我使用的：

@GetMapping(produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<Map<String, String>> hello() {
    try {
        Map<String, String> body = new HashMap<>();
        body.put("message", "Hello world");
        return new ResponseEntity<>(body, HttpStatus.OK);
    } catch (Exception e) {
        return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

springboot返回responseentity返回JSON

3 个答案: