try {

                let reader = new FileReader();

                let blob = new Blob([res.data], { type: 'application/octet-stream;charset=UTF-8' });

                reader.readAsArrayBuffer(blob);

                reader.onload = function() {

                    let data = new Blob([this.result]);

                    // 判断是否为文件流数据

                    if (data.size === 0) this.$message({ message: '生成文件失败', type: 'error' });

                };

                let downloadElement = document.createElement('a');

                let href = window.URL.createObjectURL(blob); // 创建下载的链接

                let head = res.headers['content-disposition'];

                if (!head) {

                    this.$message({ message: '导出失败', type: 'error' });

                    return;

                }

                downloadElement.href = href;

                head = decodeURI(head.split(';')[1].split('=')[1]); // url转码中文

                downloadElement.download = head; // 下载后文件名

                document.body.appendChild(downloadElement);

                downloadElement.click(); // 点击下载

                document.body.removeChild(downloadElement); // 下载完成移除元素

                window.URL.revokeObjectURL(href); // 释放掉blob对象

            } catch (e) {

                let head = res.headers['content-disposition'];

                head = decodeURI(head.split(';')[1].split('=')[1]); // url转码中文

                if ('msSaveOrOpenBlob' in navigator) {

                    window.navigator.msSaveOrOpenBlob(new Blob([res.data]), head);

                } else {

                    const url = window.URL.createObjectURL(new Blob([res.data], { type: 'application/octet-stream;charset=UTF-8' }));

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

                    link.style.display = 'none';

                    link.href = url;

                    link.setAttribute('download', head);

                    document.body.appendChild(link);

                    link.click();

                }

            }