导出功能实现

methods:{
  //导出
  handleDownloadInfo() {
    this.$http.post('/excelService/ExportExcel/informationExportExcel',
                     this.pageRequest,   //向后台传的值
                     {responseType:'arraybuffer'})
      .then((res) => { // 处理返回的文件流
        //方法一
        const content = res.data;
        const blob = new Blob([content])
        const fileName = '我是filename.xls'
        if ('download' in document.createElement('a')) { // 非IE下载
          const elink = document.createElement('a')
          elink.download = fileName
          elink.style.display = 'none'
          elink.href = URL.createObjectURL(blob)
          document.body.appendChild(elink)
          elink.click()
          URL.revokeObjectURL(elink.href) // 释放URL 对象
          document.body.removeChild(elink)
        } else { // IE10+下载
          navigator.msSaveBlob(blob)
        }
        //方法二
        // let blob = new Blob([res.data],{type:"application/vnd.ms-excel;charset=UTF-8"});
        // let objectURL = URL.createObjectURL(blob);
        // window.location.href = objectURL;
      })
  },
}