假如已这样的表头导出数据

 1.把包含表头的excel添加到项目资源目录

 2.编写代码读取表头所在sheet,并且加入需导出的数据

/*** 导出excel*/public static void downloadExcel(List<List<Object>> list, HttpServletResponse response) throws IOException {/*String tempPath =System.getProperty("java.io.tmpdir") + IdUtil.fastSimpleUUID() + ".xlsx";File file = new File(tempPath);*///获取模板文件第一个sheetClassPathResource resource = new ClassPathResource("cadreAndCompany.xls");ExcelReader reader = ExcelUtil.getReader(resource.getStream());Sheet rows = reader.getSheets().get(0);BigExcelWriter bigExcelWriter = new BigExcelWriter(rows);bigExcelWriter.passRows(3);//跳过表头// 一次性写出内容，使用默认样式，强制输出标题bigExcelWriter.write(list);//response为HttpServletResponse对象response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");//test.xls是弹出下载对话框的文件名，不能为中文，中文请自行编码response.setHeader("Content-Disposition","attachment;filename=file.xlsx");ServletOutputStream out=response.getOutputStream();// 终止后删除临时文件//file.deleteOnExit();bigExcelWriter.flush(out, true);//此处记得关闭输出Servlet流IoUtil.close(out);}