springmvc ajax提交含文件的表单

后台代码:

    @ResponseBody
    @RequestMapping("/fileUpload")
    public Json fileUpload(
            @RequestParam(value = "file", required = false) MultipartFile file,
            Reservation reservation) {
        try {
            String cId = reservationService.add(file,reservation);
            return new Json(true, "提交成功!你的查询码为："+cId+"  ", null);
        } catch (Exception e) {
            log.error(e.getMessage(),e);
            return new Json(false, "提交失败", null);
        }
    }

前台jsp:
引入jquery.form js
注意:为防止IE下会提示下载json文件,此js必须为最新版本;

前台js:

    $("#form").ajaxSubmit({
        type: "POST",
        url:"/fileUpload",
        dataType: "json",
        success: function(result){
            if (result.success) {
                //提示...
            }
        }
    });