vue 文件流转文件下载，以axios为例

let config = {

        headers: {

          "Content-Type": "multipart/form-data",

          token: token,

        },

        responseType: "blob",

      };

  axios

        .get(this.apis.templateList.exportBook, config)

        .then((res) => {

          console.log(res.data);

          loading.close();

          const blob = new Blob([res.data], {

            type: "application/vnd.ms-excel;charset=utf-8",

          });

          const downloadElement = document.createElement("a");

          const href = window.URL.createObjectURL(blob);

          downloadElement.href = href;

          downloadElement.download = "数据统计.xlsx";

          document.body.appendChild(downloadElement);

          downloadElement.click();

          document.body.removeChild(downloadElement); // 下载完成移除元素

          window.URL.revokeObjectURL(href); // 释放掉blob对象

        })

        .catch((err) => {});