文件流方式导出Excel表格

项目中有个需求请求接口获取下载的excel文件流并实现下载。

angular封装的post请求始终打印不出成功回调里的result, 一直走error。

换了个思路，使用原生的ajax发送请求。

点击下载调用downloadFile方法，用原生的ajax，重点来了，要设置responseType为'blob',

我们的请求需要加Authorization传登录时存的token

downloadFile(fileName) {

        const that =this;

          const req =new XMLHttpRequest();

          req.open('POST', this.archiveNew +'/EC/query/downLoadOrder', true);

          req.responseType ='blob';

          req.setRequestHeader('Content-Type', 'application/json');

          req.setRequestHeader('Authorization', 'Bearer ' +this.jwtToken);

          req.onload =function() {

                    const data = req.response;

                    //获取到响应通过blob转换后拿到blobUrl,动态创建一个a标签调用click方法，实现下载

                    const blob =new Blob([data]);

                    const blobUrl = window.URL.createObjectURL(blob);

                    that.downloadMethod(blobUrl, fileName);

             };

        //一定要注意JSON.stringify序列化post传的参数

          const data = JSON.stringify({'fileName': fileName});

          req.send(data);

}

downloadMethod(blobUrl, fileName) {

        // console.log(blobUrl);

          const a = document.createElement('a');

          a.className ='downloadFileA';

          a.style.display ='none';

          a.download = fileName;

          a.href = blobUrl;

          a.click();

          $('.downloadFileA').remove();

}