onRemove(file, fileList, formItem) {
        this.formModel[formItem.key] = fileList.filter(item => item != file);
        //取消上传
        if (file.status == 'ready') {
            file.cancel && file.cancel();
        }
    },
    //el文档说这个钩子 添加文件、上传成功和上传失败时都会被调用。
    //因为:auto-upload="false" 所以只有添加文件操作会调用此函数
    async onChange(file, fileList, formItem) {
        this.formModel[formItem.key] = fileList;
        try {
            //上传成功
            const { data } = await uploadFile(file);
            const [res] = data
            Object.assign(file, res, { url: res.fileUrl, status: 'success' },)
        } catch (err) {
            //上传失败
            this.formModel[formItem.key] = fileList.filter(item => item != file);
            Object.assign(file, { status: 'fail' },)
        }
    },
    

    //上传文件
    const CancelToken = axios.CancelToken;
    export const uploadFile = (file) => {
        let formData = new FormData();
        formData.append("uploadFile", file.raw);
        return POST('/upload/uploadFile', formData, {
            headers: { 'Content-Type': 'multipart/form-data' },
            onUploadProgress: (e) => {
                if (e.lengthComputable) {
                    const complete = (e.loaded / e.total * 100).toFixed(2);
                    file.percentage = Number(complete);
                }
            },
            cancelToken: new CancelToken(function executor(c) {
                file.cancel = c;
            })
        })
    }

async downloadTemplate() {
    const { data } = await xhr({ url: '/datashare/excel/download', method: 'get', responseType: 'arraybuffer' });
    download(data, 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8', '文件模板.xlsx')
 }
const download = (res, type, filename) => {
  // 创建blob对象，解析流数据
  const blob = new Blob([res], {
    type: type
  })
  // 这里就是创建一个a标签，等下用来模拟点击事件
  const a = document.createElement('a')
  // 兼容webkix浏览器，处理webkit浏览器中href自动添加blob前缀，默认在浏览器打开而不是下载
  const URL = window.URL || window.webkitURL
  // 根据解析后的blob对象创建URL 对象
  const herf = URL.createObjectURL(blob)
  a.href = herf
  a.download = filename
  document.body.appendChild(a)
  a.click()
  // 收尾工作，在内存中移除URL 对象
  document.body.removeChild(a)
  window.URL.revokeObjectURL(herf)
}