后端返回文件流，前端下载EXCEL文件的处理

参考链接：https://www.cnblogs.com/coconutGirl/p/12605562.html

/**
     * 下载附件
     */
    adjustExport(row){
      console.log(row);
      const params = {
        adjustNo: row.auditPoint.influenceCustomer
      }
      adjustExport(params).then((res) => {
        const filename = res.headers['content-disposition']
        if (filename) {
          const blob = new Blob([res.data]) //Blob {size: 3982, type: ""}
          var downloadElement = document.createElement('a')
          var href = window.URL.createObjectURL(blob)
          downloadElement.href = href
          downloadElement.download = decodeURIComponent(
            filename.split('filename=')[1]
          )
          document.body.appendChild(downloadElement)
          downloadElement.click()
          document.body.removeChild(downloadElement)
          window.URL.revokeObjectURL(href)
        } else {
          this.$message.error('下载失败')
        }
      })
      .catch((err) => {
        console.log(err)
      })
    }

api.js文件

export function adjustExport(params){
  return request({
    url: 'xxxx/export',
    method: 'get',
    responseType: 'blob',
    params
  })
}