后端返回的文件流，前端如何下载

首先配置axios

// 下载公用方法
const reqDown = (method, url, params) => {
  return axios({
    method: method,
    url: process.env.URLPATH + url,
    responseType: 'blob',
    data: params
  }).then(res => res.data);
};

然后在调用接口后

          let blob = new Blob([res], {
            type: "application/vnd.ms-excel"    // 这边的类型需要改
          });
          let url = window.URL.createObjectURL(blob)
          let link = document.createElement('a')
          link.style.display = 'none'
          link.download = '意见箱'  //  这边的名字需要改
          link.href = url
          document.body.appendChild(link)
          link.click()