下载excel的文件流

var xhr = new XMLHttpRequest();
    xhr.open("GET", `/api/total/exportExcel?month=${$(this).data("month")}&factory=${$(this).data("factory")}`, true);
    var name = $(this).data("factory") + getDays($(this).data("month"));
    xhr.setRequestHeader("token", window.localStorage.getItem("token"));
    xhr.responseType = "blob";
    xhr.onload = function(oEvent) {
            var content = xhr.response;
            var fileName = `${name}.xlsx`; // 保存的文件名
            var elink = document.createElement(‘a‘);
            elink.download = fileName;
            elink.style.display = ‘none‘;
            var blob = new Blob([content]);
            elink.href = URL.createObjectURL(blob);
            document.body.appendChild(elink);
            elink.click();
            document.body.removeChild(elink);
    };
    xhr.send();