form: function (url, paras, files, success) {
//上传的文件类型是MultipartFile[]
//如果把需要的参数直接传入，则会请求错误
//设置请求参数的数据类型

            var urlStr = UrlParas(url, paras).url;

            console.log(urlStr)
var formData = new FormData();
for (var item in paras) {

                formData.append(item, paras[item]);

            }

            for (var item in files) {

                for (var i = ; i < files[item].length; i++) {

                    formData.append(item, files[item][i]);

                }

            }

            console.log(formData)

            return;

            $.ajax({

                url: urlStr,

                data: formData,

                type: 'post',

                contentType: false,

                processData: false,

                success: success,

                error: function (msg) {

                    errorState(msg);

                }

            });

        }