1.接口层

    @PostMapping("/exprotExcelTemplate")
    public void exprotExcelTemplate(HttpServletResponse response) throws Exception {
         exportExcelService.exprotExcelTemplate(response);
    }

2.业务层

 @Override
    public void exprotExcelTemplate(HttpServletResponse response) throws Exception {
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");
        String fileName ="";
        fileName = new String(("xx模板").getBytes(), "ISO8859_1");
        response.setHeader("Content-disposition", "attachment; filename=" + fileName + (new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")).format(new Date()) + ".xlsx");
        // 创建 ExcelWriter 对象
        ExcelWriter excelWriter = EasyExcel.write(response.getOutputStream()).build();
        // 创建 WriteSheet 对象，并指定 sheet 名称
        WriteSheet writeSheet = EasyExcel.writerSheet("xx模板").sheetNo(5).build();
        // 设置导出的列头（模板的第一行）
        List<String> header = Arrays.asList("列名1", "列名2", "列名3");  // 根据实际情况设置列名
        excelWriter.write(Collections.singletonList(header), writeSheet);
        // 完成导出操作
        excelWriter.finish();
    }

3.前端请求

axios({
    method: "POST",
    url: url,
    baseURL: baseURL,
    data: data,
    responseType: "blob", //定义为blob
  }).then((data) => {);

4.或者直接用tomcat方式导出

导出excle