[JavaScript知识库]后端返回文件流前端导出表格

接口返回的类型是文件流的格式

前端：

//前端封装的接口
//请求接口时，请求类型设置为blob；responseType:'blob';
//responseType设为blob的话，返回的文件流将会被转成blob对象，不是文件流
export function exportlive(par) {
	return service({
		method: 'GET',
		url: 'exporting_live',
		params: par,
		headers: {
			'Access-Sign': signature,
			'Access-Time': timestamp,
			'Access-Device': deviceObj.device,
			'Access-Version': version,
			'Content-Type': ' application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
		},
		responseType: 'blob'
	})
}

页面中请求

getexportlive() {
				exportlive({
						liveId: this.$route.query.id,
						type: this.formState.type || '0',
						site: this.formState.site || '',
						username: this.formState.username || '',
						comnpanyName: this.formState.comnpanyName || ''
					}).then((res) => {
						var fileName = '.xlsx'
						fileName = '表格' + fileName
						let blob = new Blob([res.data], {
							type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
						})
						var url = window.URL.createObjectURL(blob);
						var aLink = document.createElement("a");
						aLink.style.display = "none";
						aLink.href = url;
						aLink.setAttribute("download", fileName);
						document.body.appendChild(aLink);
						aLink.click();
						document.body.removeChild(aLink); //下载完成移除元素
						window.URL.revokeObjectURL(url); //释放掉blob对象
					})
					.catch(function (err) {
						console.log(err);
						this.$message.warning('导出失败！')
					});

			}```
			
最终结果 导出成功



如有不成功者 可以看一下 网上找的 https://www.jianshu.com/p/bed4e8ae10ba