前端下载excel打不开求助+解法

解法：

//axios

return request({

　　url: "/saleUnit/exportSaleUnit",

　　headers: {

　　　　"biz-source-param": "BLG"

　　method: "post",

　　responseType: "blob",

　　data: params

　});


let blob = new Blob([res], { type: "application/x-xls" });
let link = document.createElement("a");
link.href = window.URL.createObjectURL(blob);
link.download = `便利购商品列表${this.$dayjs().format(
　　"YYYYMMDDHHmmss"
)}.xlsx`;
link.click();
this.$message.success("下载成功！");