vue 文件流导出获取后端文件名称

response.addHeader("Content-Disposition","attachment;filename=" + java.net.URLEncoder.encode(filename, "UTF-8"));
在后端的接口中开放这个这个响应头，前端的response就可以获取到了

import axios from "axios";
import { ElNotification } from "element-plus";
import { useUserStore } from "@/store/modules/user";
let baseUrl = import.meta.env.VITE_APP_PREFIX;
export const exportFile = (url, params) => {
  const userStore = useUserStore();
  return new Promise((resolve, reject) => {
    axios({
      url: baseUrl + url,
      method: "post",
      responseType: "blob",
      data: params,
      headers: {
        authorization: userStore.token ? `Bearer ${userStore.token}` : "",
      },
    }).then((response) => {
      let dispositionStr = response.headers["content-disposition"];
      if (dispositionStr == null || dispositionStr === "") {
        ElNotification({
            title: "温馨提示",
            message: "导出失败",
            type: "error",
          });
        reject("下载失败！");
        return;
      }
      // 获取文件名
      let dispositionArr = dispositionStr.split(";");
  
      let fileName = decodeURIComponent(dispositionArr[1]);
      fileName = fileName.split("=")[1];
      const blob = new Blob([response.data], {
        type: "application/vnd.ms-excel",
      });
      const link = document.createElement("a");
      link.href = window.URL.createObjectURL(blob);
      link.download =fileName;
      document.body.appendChild(link);
      link.click();
      window.setTimeout(function () {
        window.URL.revokeObjectURL(blob);
        document.body.removeChild(link);
        ElNotification({
            title: "温馨提示",
            message: "导出成功",
            type: "success",
          });
        resolve()
      }, 0);
    });
  });
};