springBoot + vue3 + element plus + ts + vite 实现 文件导出

后台第三方jar使用easyexcel 3.0.5

<dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>easyexcel</artifactId>
            <version>${easyexcel.version}</version>
</dependency>

后端代码实现：

    @GetMapping("export")
    public void exportDailyWeekly(HttpServletResponse response,WrDailyReportQuery query) {
        String fileName = "周报数据.xlsx";
        response.setContentType("application/x-www-form-urlencoded");
        try {
            response.setHeader("Access-Control-Expose-Headers", "content-disposition");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        List<WrDailyReportVO> exportDailyWeeklyList = dailyReportService.getDailyWeekly(query);
        try {
            EasyExcel.write(response.getOutputStream(), WrDailyReportVO.class).sheet("周报").doWrite(exportDailyWeeklyList);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


前端vue 封装的request.ts 加上 二进制的文件处理即可
else {
	// 响应数据为二进制流处理(Excel导出) 进行二进制文件处理
	if (response.data instanceof ArrayBuffer) {
		return response;
	}
}


封装的单独的xxx.ts中 
export const exportWeekly = (queryForm: any) => {
	return service({
		url: 'xxxx/xxx/xxx',
		method: 'get',
		params: queryForm,
		responseType: 'arraybuffer',
	});
}

最后：
const exportDailyWeekly = () => {
	return exportWeekly(state.queryForm).then(res => {
		const blob = new Blob([res.data], {
			type: 'application/x-www-form-urlencoded;charset=utf-8',
		});
		const a = document.createElement('a');
		const href = window.URL.createObjectURL(blob);//下载的链接
		console.log("下载的链接是多少" + href);
		a.href = href;
		a.download = decodeURI(
			res.headers['content-disposition'].split(";")[1].split('=')[1]
		);//获取的后台设置
		console.log(res.headers['content-disposition'])
		document.body.appendChild(a);
		a.click();
		document.body.removeChild(a);
		window.URL.revokeObjectURL(href);
	})
}


按照以上方式 即可完成excel文件下载