js 下载 后台传过来的excle 流

ajax 不能 实现 下载流的 功能,于是这么写即可

function downLoadExcle(url,data) {
    let timestamp = new Date().getTime();
    let xmlResquest = new XMLHttpRequest();
    xmlResquest.open("POST", url, true);//post请求,根据路径和参数下载

    xmlResquest.setRequestHeader("Content-type", "application/json");
    xmlResquest.responseType = "blob";
    xmlResquest.onload = function (oEvent) {
        let content = xmlResquest.response;
        let elink = document.createElement("a");
        elink.download = timestamp + ".xlsx";
        elink.style.display = "none";
        let blob = new Blob([content]);
        elink.href = URL.createObjectURL(blob);
        document.body.appendChild(elink);
        elink.click();
        document.body.removeChild(elink);
    };
    xmlResquest.send(data);//传递参数
}