JXL把数据库数据导出为EXCEL文件

JXL把数据库数据导出为EXCEL文件1.第一步:查处数据库信息2.解析为wookbook对象3.保存到服务器提供下载

public String exportMeetingUser() throws NumberFormatException,
			ServiceException, IOException, RowsExceededException,
			WriteException {
		String forward = SUCCESS;

		// TODO 进行导出操作
		// 获取查询条件
		String username = this.getParameter("username");
		String mobile = this.getParameter("mobile");
		String isAdmin = this.getParameter("isAdmin");
		String meetingId = this.getParameter("meetingId");
		User user = new User();
		user.setName(username);
		user.setMobile(mobile);

		// 把PAGE_SIZE设置很大

		pageSize = 1000;
		Pager<User> pager = userService.findMeetingUserPager(
				Long.valueOf(meetingId), user, currentPage, pageSize, isAdmin);
		log.debug("meeting id is： {}", meetingId);

		List<User> userList = pager.getPageRecords();

		String[] title = { "姓名", "手机号码", "职位(通讯录)", "单位", "房间号", "显示房间号", "性别",
				"电子邮箱", "城市", "加入通讯录", "显示电话号码", "排序", "职位简称", "显示职位简称" };
		// TODO 进行导出的操作
		SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
		String exportFileName = sdf.format(new Date());
		// 创建文件夹
		File uploadFoldPath = new File(fileSystemService.getDocumentRoot()
				+ this.USER_EXPORT_FOLDER);
		if (!uploadFoldPath.exists()) {
			uploadFoldPath.mkdirs();
		}
		// 判断文件是否存在
		String fileSaveName = exportFileName + ".xls";
		String dstPath = fileSystemService.getDocumentRoot()
				+ this.USER_EXPORT_FOLDER + File.separator + fileSaveName;
		String from = "WEB";
		String documentRoot = fileSystemService.getDocumentRoot();
		// DOCUMENT ROOT
		getRequest().setAttribute("documentRoot", documentRoot);
		getRequest().setAttribute("from", from);

		OutputStream os = new FileOutputStream(dstPath);

		// 再建完这个文件的时候再建立工作文件
		jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(os);
		int rowIndex = 0;
		
		Label label;
		WritableCellFormat wc = new WritableCellFormat();
		wc.setAlignment(Alignment.CENTRE);
		//wc.set
		
		WritableSheet sheet = wwb.createSheet("会议用户导出", 0);
		label = new Label(2, rowIndex, "此文件为会议云用户导出文件");
		sheet.addCell(label);
		
		rowIndex++;
		
		// 将列标题循环添加到Label中
		for (int i = 0; i < title.length; i++) {
			label = new Label(i, rowIndex, title[i]);
			sheet.addCell(label);
		}
		rowIndex++;
	
		
		// TODO下面是添加数据
		
		if (userList != null && userList.size() > 0) {
			for (User exportUser : userList) {

				MeetingMember member = meetingMemberService.selectById(
						exportUser.getId(), Long.valueOf(meetingId));
				exportUser.setMeetingMember(member);
				// "姓名", "手机号码", "职位(通讯录)", "单位", "房间号", "显示房间号", "性别",
				// "电子邮箱", "城市", "加入通讯录", "显示电话号码", "排序", "职位简称", "显示职位简称"
				// 用户名
				label = new Label(0, rowIndex, exportUser.getName());
				sheet.addCell(label);

				label = new Label(1, rowIndex, exportUser.getMobile());
				sheet.addCell(label);

				label = new Label(2, rowIndex, exportUser.getMeetingMember()
						.getJob());
				sheet.addCell(label);
				// 单位
				label = new Label(3, rowIndex, exportUser.getMeetingMember()
						.getDepartment());
				sheet.addCell(label);
				// 房间号
				label = new Label(4, rowIndex, exportUser.getMeetingMember()
						.getRoomNumber());
								rowIndex++;
			}
		}

		wwb.write();
		wwb.close();

		
		// 现在开始进行下载操作
		MeetingFiles meetingFiles = new MeetingFiles();
		meetingFiles.setFilePath(this.USER_EXPORT_FOLDER);
		meetingFiles.setFileName(fileSaveName);
		meetingFiles.setFileSaveName(fileSaveName);

		this.getRequest().setAttribute("meetingFiles", meetingFiles);

		return forward;

		
	}