我有弹簧控制器：

@RequestMapping(value = "/add", method = RequestMethod.POST, 
     consumes = "application/json")
public @ResponseBody ResponseDto<Job> add(User user) {
    ...
}

我可以使用APACHE HTTP CLIENT张贴这样的对象：

HttpPost post = new HttpPost(url);
List nameValuePairs = new ArrayList();
nameValuePairs.add(new BasicNameValuePair("name", "xxx"));
post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = client.execute(post);

在控制器中，我得到名称为“ xxx”的用户

现在，我想创建User对象并将其发布到服务器，我试图与GSON对象一起使用，如下所示：

User user = new User();
user.setName("yyy");

Gson gson = new Gson();
String json = gson.toJson(user);

HttpClient client = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
StringEntity entity = new StringEntity(json.toString(), HTTP.UTF_8);
entity.setContentType("application/json");
httpPost.setEntity(entity);
HttpResponse response = client.execute(httpPost);

但是以这种方式，我进入具有空字段的服务器用户对象…

我该如何解决？