FormData上传文件同时附带其他参数

前端js代码：

       function fileSubmit() {

            var formData = new FormData();
            formData.append("file",$("#FileUpload")[0].files[0]);

            var type = $('#file_type').val()
            var user = $('#file_user').val()
            formData.append("type",type)
            formData.append("user",user)

            $.ajax({
                url: baseURL+"etl/upload",
                data:  formData,
                type: "Post",
                dataType: "formData",
                cache: false,//上传文件无需缓存
                processData: false,//用于对data参数进行序列化处理 这里必须false
                contentType: false, //必须
                success: function (data) {
                    console.log(data)
                    console.log("success")

                    if(data.code == 500){
                        console.log(data.msg)
                        console.info("error");
                        $('#file_sqlRes').html("<span>"+data.msg+"</span>")
                    }else{
                        var taskId = data.taskId
                        $('#file_sqlRes').html("<span>TaskId为："+taskId+"</span>")
                    }

                },
                error: function (data) {

                }
            })

        }

后端Java代码：

/**
     * 单文件上传
     *
     * @param file
     */
    @RequestMapping(value = "/upload", method = RequestMethod.POST)
    @ResponseBody
    public AjaxObject upload(@RequestParam("file") MultipartFile file,String type,Long user) {

        String taskType = "F";
        String featureType = type;
        Long userOpt = user;
        Long taskId = etlUtil.getTaskId();


        if (file.isEmpty()) {
            return AjaxObject.error(500, "上传文件失败,请检查上传的文件");
        }
        // 获取文件名
        String fileName = file.getOriginalFilename();
        logger.info("上传的文件名为：" + fileName);
        // 获取文件的后缀名
        String suffixName = fileName.substring(fileName.lastIndexOf("."));
        logger.info("上传的后缀名为：" + suffixName);

        // 文件上传后的路径
        String filePath = etlConf.getUploadFilePath();

        File dest = new File(filePath + fileName);
        // 检测是否存在目录
        if (!dest.getParentFile().exists()) {
            dest.getParentFile().mkdirs();
        }

        try {
            file.transferTo(dest);
  
            Long res = 123L

            if (res != 0) {
                etlUtil.runDatax(taskId.toString(), featureType);
                logger.info("taskId", taskId.toString());
                return AjaxObject.ok().put("taskId", taskId.toString());
            } else {
                logger.error("TaskId插入失败");
                return AjaxObject.error(500, "TaskId插入失败,请联系管理员！").put("taskId", taskId.toString());
            }

        } catch (IllegalStateException e) {
            e.printStackTrace();
            logger.error(e.toString(),e);
            return AjaxObject.error(500, "上传文件失败,请检查上传的文件,IllegalStateException");
        } catch (IOException e) {
            e.printStackTrace();
            logger.error(e.toString(),e);
            return AjaxObject.error(500, "上传文件失败,请检查上传的文件,IOException");
        }

    }