利用jxl操作Excel（三）

导出数据

try{
  //设置导出文件为Excel格式，文件名为UserInfo+yyyyMMddHHmmss
  HttpServletResponse response = ServletActionContext.getResponse();
  Date dt = new Date();
  DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
  String sFileName = "UserInfo" + df.format(dt).toString();
  OutputStream ops = response.getOutputStream();
  response.reset();
  response.setHeader("Content-Disposition", "attachment; filename="+ sFileName +".xls");
  response.setContentType("application/msexcel");
  //设置写入的数据表为Sheet1
  WritableWorkbook wwb = Workbook.createWorkbook(ops);
  WritableSheet ws = wwb.createSheet("Sheet1", 0);
  //设置单元格格式
  WritableFont wf = new WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false,UnderlineStyle.NO_UNDERLINE,Colour.BLACK);
  WritableCellFormat wcf = new WritableCellFormat(wf);
  wcf.setAlignment(jxl.format.Alignment.CENTRE);
  wcf.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
  //设置列宽
  ws.setColumnView(0, 10);
  ws.setColumnView(1, 20);
  //写入第一行（标题行）
  ws.addCell(new Label(0, 0, "UserName", wcf));
  ws.addCell(new Label(1, 0, "UserPassword", wcf));
  //从数据库中读取内容并依次从第二行写入Excel
  List<UserInfo> userInfoList = userInfoDao.findAll();
  if (userInfoList.size() > 0){
    for (int i=0; i<userInfoList.size(); i++){
      ws.addCell(new Label(0, i+1, userInfoList.get(i).getUserName(), wcf));
      ws.addCell(new Label(1, i+1, userInfoList.get(i).getUserPassword(), wcf));
    }
  }else{
    result = "FAILURE";
    return result;
  }
  //正式写入
  wwb.write();
  //关闭连接
  wwb.close();
  ops.close();
  result = "SUCCESS";
}catch(Exception e){
  result = "FAILURE";
}