upload上传多文件，一个接口同步提交

upload上传多文件，一个接口同步提交

如图

    <el-upload class="upload-demo" action="#" :headers="headers" ref="upload" :file-list="uploadCfg.fileList"
            :show-file-list="false" :before-upload="handleBeforeUpload" :http-request="handleUploadHttp" :multiple=true>
            <el-tag style="margin-left:12px;" class="uploadFilecss">压缩上传
            </el-tag>
          </el-upload>

  url: this.baseurl + "/common/uploads",
        headers: {
          Authorization: "Bearer " + getToken(),
        },
        uploadCfg: {
          fileList: [], // 默认绑定的文件列表
          validFileList: [] // 通过校验的文件列表
        }

   handleBeforeUpload(file) {
        let vm = this;
        return new Promise((resolve, reject) => {
          // 收集文件列表
          this.uploadCfg.validFileList.push(file);
          // 校验文件列表
          // vm.handleDebounceVarifyFile();

          setTimeout(function () {
            if (!_.isEmpty(vm.uploadCfg.validFileList)) {
              resolve(true);
            } else {
              reject(true);
            }
          }, 100);
        });
      },
      /**
       * @desc  防抖触发文件上传前，保证批量校验
       */
      handleDebounceVarifyFile: _.debounce(function () {
        let excel_file = {};
        if (_.isEmpty(this.uploadCfg.validFileList)) {
          return;
        }

        excel_file = this.uploadCfg.validFileList.find(item => {
          return /\.(xls)|\.(xlsx)$/.test(item.name);
        });

        // 如果文件校验不合理，清空合法文件列表，并提示
        if (_.isEmpty(excel_file)) {
          this.uploadCfg.validFileList = [];
          this.$message.warning('至少上传一个xls或者xlsx格式的文件！');
        }
      }, 20),
      /**
       * @desc  自定义上传
       */
      handleUploadHttp() {
        this.handleDebounceUpload();
      },

      /**
       * @desc  防抖触发文件上传前，保证批量上传
       */
      handleDebounceUpload: _.debounce(function () {
        if (_.isEmpty(this.uploadCfg.validFileList)) {
          return;
        }

        let formData = new FormData();

        this.uploadCfg.validFileList.forEach((item_file) => {
          console.log(item_file);
          formData.append(`files`, item_file);
        });
        console.log(formData);
        uploadXsxx(formData).then(() => {
          this.$message.success('上传成功！');
          this.uploadCfg.validFileList = [];
          this.init(this.name, this.prefix);
        }).catch(err => {
          console.log('上传失败', err);
        });
      }, 20),