1、设置请求参数

// 导出订单Excel
export const getOrderExcel = param => {
    return request({
        url: '/order/excel/',
        method: 'get',
        params: param,
        responseType: 'blob',
        headers: {
            'Content-Type': 'application/x-download'
        }
    });
};

需要设置responseType和Content-Type

2、触发文件下载

getOrderExcel(query).then(res => {
    console.log(res);
    const link = document.createElement("a");
    link.style.display = "none";
    link.href = URL.createObjectURL(res);
    link.setAttribute("download", "订单信息.xlsx");
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
})