文件流下载

dllalsdf(){

        //  获取时间戳

        let timestamp=new Date().getTime();

        // 获取XMLHttpRequest

        let xmlResquest = new XMLHttpRequest();

        //  发起请求

        xmlResquest.open("POST",'/pc/authority/exportAuthority', true);

        // 设置请求头类型

        xmlResquest.setRequestHeader("Content-type", "application/json");

        //  设置请求token

        xmlResquest.setRequestHeader(

          "Authorization",

          getToken()

        );

        xmlResquest.responseType = "blob";

        //  返回

        xmlResquest.onload = function(oEvent) {

        let content = xmlResquest.response;

        // 组装a标签

        let elink = document.createElement("a");

        // 设置下载文件名

        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(JSON.stringify({groupId: 270}));

      },