jxl 导出数据到excel的实例讲解

String times = (new SimpleDateFormat("yyyyMMddHHmmss")).format(new Date());String fname = "系统日志" + times; // 文件名List<Logs> list=logsService.selectForList(hql.toString());  String path = request.getSession().getServletContext().getRealPath("/")    + "xls/"    + (new SimpleDateFormat("yyyyMMdd")).format(new Date());  File file = new File(path);  // 如果文件夹不存在则创建  if (!file.exists() && !file.isDirectory()) {   file.mkdir();  }  response.setContentType("application/vnd.ms-excel;charset=utf-8");// // 指定文件的保存类型。  response.setCharacterEncoding("utf-8");  ExportUtil.writer_log(request,fname, list, response);//下载到本地