layui 框架的upload上传文件的data参数传到后端的方法

before: function (obj) {
                    jsonParams.action = "CommonImportExcel";
                    let ss = JSON.stringify(jsonParams);
                    this.data = JSON.parse(ss);                  
                    //console.log(jsonParams);
                }
 
data传参如：
jsonParams={ID:112,name:"ssss"}

before: function(obj) {
    this.data = {"xxx": "xxx"};
 }

before: function (obj) {
            $("#importExcelMsg").text("数据导入中，请稍候...");
            var data = table.checkStatus('reloadSearch2').data;
            if (data.length > 0) {
                for (var i in data) {
                    var roleId = data[i].id;
                    roleIds += roleId + ",";
                }
                roleIds = roleIds.substring(0, roleIds.length - 1);
            }
            this.data = {
                roleIds: roleIds,
                operatorNo: operator.operatorNo
            }
        }

@RequestMapping(value = "/importExcel", method = RequestMethod.POST)
    public ModelMap importExcel(@RequestParam("file") MultipartFile multipartFile, HttpServletRequest request,
                                String roleIds, String operatorNo) {
}