上传插件问题IE不解析后台返回JSON

后台：

response.setContentType("text/html;charset=UTF-8");
response.setCharacterEncoding("utf-8");
IOUtils.write(String.format("{\"%s\":\"%s\"}","fileId",model.getId()),response.getOutputStream());
IOUtils.closeQuietly(response.getOutputStream());

 

前台：

onComplete: function (filename, response) {
     var fileId = response.fileId;            
}});