第一步,添加依赖:
<!--poi-excel--><dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.6</version></dependency> 引入ExcelUtil 工具类:
public class ExcelUtil { /** * 导出Excel * @param sheetName sheet名称 * @param title 标题 * @param values 内容 * @param wb HSSFWorkbook对象 * @return */ public static HSSFWorkbook getHSSFWorkbook(String sheetName,String []title,String [][]values, HSSFWorkbook wb){ // 第一步,创建一个HSSFWorkbook,对应一个Excel文件 if(wb == null){ wb = new HSSFWorkbook(); } // 第二步,在workbook中添加一个sheet,对应Excel文件中的sheet HSSFSheet sheet = wb.createSheet(sheetName); // 第三步,在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制 HSSFRow row = sheet.createRow(0); // 第四步,创建单元格,并设置值表头 设置表头居中 HSSFCellStyle style = wb.createCellStyle(); style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式 //声明列对象 HSSFCell cell = null; //创建标题 for(int i=0;i<title.length;i++){ cell = row.createCell(i); cell.setCellValue(title[i]); cell.setCellStyle(style); } //创建内容 for(int i=0;i<values.length;i++){ row = sheet.createRow(i + 1); for(int j=0;j<values[i].length;j++){ //将内容按顺序赋给对应的列对象 row.createCell(j).setCellValue(values[i][j]); } } return wb; }} 在controller实现:
@RequestMapping("/export")@ResponseBodypublic void export(HttpServletRequest request, HttpServletResponse response) throws Exception { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); //获取数据 List<BsAuthUser> list = bsAuthUserService.queryAllBsAuthUser();//查询到了所有的用户 //excel标题 String[] title = {"用户Id", "用户密码", "用户名", "创建日期", "状态"}; //excel文件名 String fileName = "用户表" + System.currentTimeMillis() + ".xls"; //sheet名 String sheetName = "用户信息表"; String content[][] = new String[list.size()][title.length]; for (int i = 0; i < list.size(); i++) { BsAuthUser obj = list.get(i); content[i][0] = obj.getAuthUserId().toString(); content[i][1] = obj.getAuthPassword(); content[i][2] = obj.getAuthUsername(); content[i][3] = sdf.format(obj.getCreateDate()); content[i][4] = obj.getState().toString(); } //创建HSSFWorkbook HSSFWorkbook wb = ExcelUtil.getHSSFWorkbook(sheetName, title, content, null); //响应到客户端 try { this.setResponseHeader(response, fileName); OutputStream os = response.getOutputStream(); wb.write(os); os.flush(); os.close(); } catch (Exception e) { e.printStackTrace(); } } //发送响应流方法public void setResponseHeader(HttpServletResponse response, String fileName) { try { try { fileName = new String(fileName.getBytes(), "ISO8859-1"); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } response.setContentType("application/octet-stream;charset=ISO8859-1"); response.setHeader("Content-Disposition", "attachment;filename=" + fileName); response.addHeader("Pargam", "no-cache"); response.addHeader("Cache-Control", "no-cache"); } catch (Exception ex) { ex.printStackTrace(); }} 下载地址是浏览器的默认下载地址。
原文地址:https://www.cnblogs.com/chenzhengwei/p/10723572.html
时间: 2024-11-09 00:42:33