//下载文件
function downLoad(url) {
var xhr = new XMLHttpRequest();
xhr.open("get", url, true);
xhr.responseType = "blob";
xhr.onload = function () {
var blob = this.response;
const fileName = url.split("/")[url.split("/").length - 1]; // 导出文件名
let a = document.createElement("a");
a.download = fileName;
a.style.display = "none";
a.href = window.URL.createObjectURL(blob);
a.target = "_blank";
document.body.appendChild(a);
a.click();
URL.revokeObjectURL(a.href); // 释放URL 对象
document.body.removeChild(a); // 删除 a 标签
};
xhr.send();
}