JXL把数据库数据导出为EXCEL文件

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;

}