请求被覆盖，原来代码
function download(url){
window.open(url);
}
没有后端配合的情况下改成
function download(url){
//获得id为downLoadListFrame的frame
var divFrame = window.parent.document.getElementById("downLoadListFrame")
//判断是否存在，如果存在先移除，再重新创建
if (divFrame != null) {
window.parent.document.body.removeChild(divFrame)
}
//重新创建
var iframe = window.parent.document.createElement("iframe");
iframe.setAttribute("id", "downLoadListFrame");
//download_file.id = "downFrame";
window.parent.document.body.appendChild(iframe);
divFrame = window.parent.document.getElementById("downLoadListFrame");
//隐式调用，（注意：window.parent.document 适应对于，farme内部代码，调用frame 外部dom；如果项目未用frame，改写成 document即可）
divFrame.src = url;
divFrame.style.display = "none";
}
如果请求后端接口去下载文件流的方式
function download(params, downloadName, url,type){
let that = this;
let data = params;
let xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function () {
let a;
if (xhttp.readyState === 4 && xhttp.status === 200) {
// for ie 10+
if (window.navigator.msSaveBlob) {
window.navigator.msSaveOrOpenBlob(xhttp.response, downloadName);
return;
}
a = document.createElement('a');
a.href = window.URL.createObjectURL(xhttp.response);
a.download = downloadName;
a.style.display = 'none';
document.body.appendChild(a);
a.click();
}
};
let mothed = type?type:'POST';
xhttp.open(mothed, process.env.VUE_APP_BASE_API + url);
xhttp.setRequestHeader("Content-Type", "application/json");
xhttp.setRequestHeader("token", getToken() || ''); //根据实际情况是否要加token
xhttp.responseType = 'blob';
xhttp.send(JSON.stringify(data));
}
params入参， downloadName名称，, downloadUrl下载地址，type请求类型get/post
