//文件下载
function downLoadFile(ids, name) {
    //获取token
    var tableName = layui.data(setter.tableName);
    //创建下载请求
    var oReq = new XMLHttpRequest();
    //url参数为拿后台数据的接口
    oReq.open("POST", api.COMMON.FILE_MANAGE.FILE_LIST_DOWNLOAD, true);
    oReq.responseType = "blob";
    oReq.onload = function (oEvent) {
        var content = oReq.response;
        var elink = document.createElement('a');
        //name为后台返给前端的文件名，后缀名必须加，后台有返回后缀就不用管，不然下载在本地不好打开。
        elink.download = name + ".xlsx";
        elink.style.display = 'none';
        var blob = new Blob([content], {type: "application/x-www-form-urlencoded"});
        elink.href = URL.createObjectURL(blob);
        document.body.appendChild(elink);
        elink.click();
        document.body.removeChild(elink);
    };
    oReq.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    //请求头里放入用户口令，必须在.open()和.send()之间设置
    oReq.setRequestHeader('Blade-Auth', tableName['Blade-Auth']);
    oReq.send("ids=" + ids);
}