Question

String Stringifiedjson = new Gson().toJson(user);
Log.d("SpringAndroid", Stringifiedjson);

HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.setAccept(Collections.singletonList(new 
         MediaType("application", "json")));

HttpEntity <? > requestEntity = new HttpEntity < Object >   
       (Stringifiedjson, requestHeaders);

GsonHttpMessageConverter messageConverter = new GsonHttpMessageConverter();
List < HttpMessageConverter <? >> messageConverters = 
      new ArrayList < HttpMessageConverter <? >> ();
messageConverters.add(messageConverter);

RestTemplate restTemplate = new RestTemplate();
restTemplate.setMessageConverters(messageConverters);

try {   
    ResponseEntity<String> responseEntity = restTemplate.
         exchange(url, HttpMethod.POST, requestEntity, String.class);               
}

我收到400 Bad Request，但是当我在我的小提琴手中发送Stringifiedjson时。我得到一个有效的response。现在如何使用RestTemplate发布GSON对象

Answer 1

我有同样的问题。我通过传递Object本身而不是包含该Object的JSON表示的String来解决它。

简而言之，我改变了：

String jsonObject = convertToJSON(myObject);
HttpEntity <? > requestEntity = new HttpEntity <String>   
       (jsonObject, requestHeaders);

要：

HttpEntity <? > requestEntity = new HttpEntity <MyObject>   
       (myObject, requestHeaders);

在这种情况下，MyObject是我想要在Controller的@RequestBody参数中捕获的java bean。

Answer 2

我认为问题可能在于您的http请求标头以下对我有用。

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);

HTTPClientErrorException：400使用Spring REST模板的错误请求

2 个答案: