vue element 导出下载功能开发

request.js中定义：

let downloadLoadingInstance;

export function download(url, params, filename) {
  downloadLoadingInstance = Loading.service({ text: "正在下载数据，请稍候", spinner: "el-icon-loading", background: "rgba(0, 0, 0, 0.7)", })
  return service.post(url, params, {
      transformRequest: [(params) => { return tansParams(params) }],
      headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
      responseType: 'blob'
  }).then(async (data) => {
    const isLogin = await blobValidate(data);
    if (isLogin) {
        const blob = new Blob([data])
        saveAs(blob, filename)
    } else {
        const resText = await data.text();
        const rspObj = JSON.parse(resText);
        const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
        Message.error(errMsg);
    }
    downloadLoadingInstance.close();
  }).catch((r) => {
      console.error(r)
      Message.error('下载文件出现错误，请联系管理员！')
      downloadLoadingInstance.close();
  })
}


然后vue页面中引用JS 调用方法即可：

// 查询参数data:  
queryParams: {        
  pageNum: 1,        
  pageSize: 10
}

import {download} from '@/utils/request'

download('system/post/export',
     {        ...this.queryParams      },
   `post_${new Date().getTime()}.xlsx`
)