JAVA导出Excel并弹出下载框
Posted Asura2017
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一、引言
JAVAWeb开发中导入导出Excel必不可少,本文介绍原始方法的导出,导入其他章节介绍
二、相关JAR包
1 <!--导入导出 2021年5月9日10:22:55 yxp--> 2 <dependency> 3 <groupId>org.apache.poi</groupId> 4 <artifactId>poi</artifactId> 5 <version>3.16</version> 6 </dependency> 7 <dependency> 8 <groupId>org.apache.poi</groupId> 9 <artifactId>poi-ooxml</artifactId> 10 <version>3.16</version> 11 </dependency>
三、关键代码
/** * yxp * 2021年6月16日15:32:57 * 条件查询导出Excel * @param personnelQo 查询参数 * @return */ @ApiOperation(value = "条件查询导出Excel") @GetMapping("/excutePersonnelByExcelJN") public void excutePersonnelByExcelJN(PersonnelInfoQo qo, HttpServletResponse response) throws IOException { aaa(qo,response); } public void aaa(PersonnelInfoQo qo,HttpServletResponse res) throws IOException { /** * 以下为生成Excel操作 */ // 1.创建一个workbook,对应一个Excel文件 HSSFWorkbook wb = new HSSFWorkbook(); // 2.在workbook中添加一个sheet,对应Excel中的一个sheet HSSFSheet sheet = wb.createSheet("XXX表"); // 3.在sheet中添加表头第0行,老版本poi对excel行数列数有限制short HSSFRow row = sheet.createRow((int) 0); // 4.创建单元格,设置值表头,设置表头居中 HSSFCellStyle style = wb.createCellStyle(); // 居中格式 style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 设置表头 HSSFCell cell = row.createCell(0); cell.setCellValue("小区名称"); cell.setCellStyle(style); cell = row.createCell(1); cell.setCellValue("姓名"); cell.setCellStyle(style); cell = row.createCell(2); cell.setCellValue("性别"); cell.setCellStyle(style); cell = row.createCell(3); cell.setCellValue("年龄"); cell.setCellStyle(style); cell = row.createCell(4); cell.setCellValue("身份证"); cell.setCellStyle(style); cell = row.createCell(5); cell.setCellValue("电话号"); cell.setCellStyle(style); cell = row.createCell(6); cell.setCellValue("住址"); cell.setCellStyle(style); cell = row.createCell(7); cell.setCellValue("车牌号"); cell.setCellStyle(style); cell = row.createCell(8); cell.setCellValue("人员类型"); cell.setCellStyle(style); cell = row.createCell(9); cell.setCellValue("是否迁出"); cell.setCellStyle(style); IPage<PersonnelInfoVo> personnelIPage = personnelInfoMapper.selectPageInfo(new Page<>(0, 8000), qo, qo.getScopeId(), qo.getScopeLevel()); List<PersonnelInfoVo> lists = personnelIPage.getRecords(); // 循环将数据写入Excel for (int i = 0; i < lists.size(); i++) { row = sheet.createRow((int) i + 1); PersonnelInfoVo list= lists.get(i); // 创建单元格,设置值 row.createCell(0).setCellValue(list.getPlotName()); row.createCell(1).setCellValue(list.getUserName()); row.createCell(2).setCellValue(list.getSex()); row.createCell(3).setCellValue(list.getAge()); row.createCell(4).setCellValue(list.getIdCard()); row.createCell(5).setCellValue(list.getPhone()); row.createCell(6).setCellValue(list.getHouseAddress()); row.createCell(7).setCellValue(list.getNo()); row.createCell(8).setCellValue(list.getType()); row.createCell(9).setCellValue(list.getEmigration()); } //弹出下载 String fileName = "XXX表"; ByteArrayOutputStream os = new ByteArrayOutputStream(); wb.write(os); byte[] content = os.toByteArray(); InputStream is = new ByteArrayInputStream(content); // 设置response参数,可以打开下载页面 res.reset(); res.setContentType("application/vnd.ms-excel;charset=utf-8"); res.setHeader("Content-Disposition", "attachment;filename=" + new String((fileName + ".xls").getBytes(), "iso-8859-1")); ServletOutputStream out = res.getOutputStream(); BufferedInputStream bis = null; BufferedOutputStream bos = null; try { bis = new BufferedInputStream(is); bos = new BufferedOutputStream(out); byte[] buff = new byte[2048]; int bytesRead; // Simple read/write loop. while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) { bos.write(buff, 0, bytesRead); } } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } finally { if (bis != null) bis.close(); if (bos != null) bos.close(); } }
注意,如果顶部注解是@RestController前端是不会弹出下载框的,需要改为@Controller
//不弹出下载框,直接下载到本地
FileOutputStream out =new FileOutputStream("E:/XXX.xls"); wb.write(out); out.close();
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