title: @RequestPart("json") as a property in ModelAttribute
body: <p>is there a way to embed JSON object into model attribute in spring MVC?
  For example on the client side :</p>
  
  <pre><code>var obj = JSON.parse(user); //user is a json string containing user object info
  var formdata =  new FormData();
  formdata.append("userInfo",obj);
  </code></pre>
  
  <p>on Server side :</p>
  
  <pre><code>@RequestMapping(value = "/here", method = {
              RequestMethod.POST, RequestMethod.GET }, headers = "content-type=multipart/form-data")
      @ResponseBody
      public String doSomething(
      @ModelAttribute MyForm myForm,
              HttpServletRequest request,
              HttpServletResponse response
      ) {
  User user = myForm.getUserInfo();
  }
  </code></pre>