Spring-RequestBody映射MAP结构

RequestBody映射MAP结构，前后端代码示例：

$.ajax({    url:url,    data:JSON.stringify(fileData),    type:'POST',    dataType:"json",    contentType:"application/json"}).done(function(resp){    console.log(file.id+":"+file.name+" 上传完毕");    if(resp.success){            }else{           }});

@RequestMapping(value="/saveFileModel", method = RequestMethod.POST)public @ResponseBody JsonResult saveFileModel(        @RequestBody  Map<String, Object> data,        HttpServletRequest req, HttpServletResponse res){    String contentType = (String)data.get(TYPE);