Ajax 上传文件

 var options = {
                       url:url,
                       type:"post",
                       data:$('form[name="addStudnoForm"]').serialize(),
                dataType: "json",
                contentType:"application/json; charset=utf-8",
                success:function(data){

                   layer.alert(data.msg, {

            skin:'layui-layer-lan'

            ,closeBtn: 0
           ,shift: 4 //动画类型

        });

                   if(data.code){

                    window.opener.reload();

                    studno.goParentPage();

                   }

            },
                error: function (data) {
                    

                }

        }

       $('#addStudnoForm').ajaxSubmit(options);