vue+axios接受后台接口返回的流文件，导出为excel文件，操作方法及乱码问题

//导出
    exportExcel() {
      this.axios
        .post(
          "接口地址",
 			{
            headers: {
              "Content-Type": "application/json"//设置请求头，
            },
            responseType: "blob"//设置responseType
          }
        )
        .then(res => {
          const link = document.createElement("a");
          const blob = new Blob([res.data], {
            type: "application/vnd.ms-excel"
          });
          link.style.display = "none";
          link.href = URL.createObjectURL(blob);
          link.setAttribute("download", `统计报表.xls`);
          document.body.appendChild(link);
          link.click();
          document.body.removeChild(link);
        })
        .catch(r => {
          console.error(r);
        });
    },