//抑制过时 API的警告,不然有些代码会被打横线
@SuppressWarnings("deprecation")
public boolean exportUser() {
// TODO Auto-generated method stub
// 第一步,创建一个webbook,对应一个Excel文件
try {
HSSFWorkbook wb = new HSSFWorkbook();
// 第二步,在webbook中添加一个sheet,对应Excel文件中的sheet
HSSFSheet sheet = wb.createSheet("用户列表");
// 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short
HSSFRow row = sheet.createRow((int) 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
HSSFCell cell = row.createCell((short) 0);
cell.setCellValue("序号");
cell.setCellStyle(style);
cell = row.createCell((short) 1);
cell.setCellValue("登录时间");
cell.setCellStyle(style);
cell = row.createCell((short) 2);
cell.setCellValue("用户手机号码");
cell.setCellStyle(style);
cell = row.createCell((short) 3);
cell.setCellValue("用户名");
cell.setCellStyle(style);
cell = row.createCell((short) 4);
cell.setCellValue("性别");
cell.setCellStyle(style);
cell = row.createCell((short) 5);
cell.setCellValue("城市");
cell.setCellStyle(style);
cell = row.createCell((short) 6);
cell.setCellValue("运营商");
cell.setCellStyle(style);
// 第五步,写入实体数据 实际应用中这些数据从数据库得到,
List<Map<String, Object>> list = reportDAO.exportActiveUser();
int j=1;
for (Map<String, Object> mapList : list) {
if(j<=list.size()){
row = sheet.createRow((short) j);
String user_id = String.valueOf(mapList.get("user_id"));
String login_time = (String) mapList.get("login_time");
String phone = (String) mapList.get("phone");
String nickname = (String) mapList.get("nickname");
String sex = (String)mapList.get("sex");
String pn_areaname = (String) mapList.get("pn_areaname");
String pn_opername = (String) mapList.get("pn_opername");
// 第四步,创建单元格,并设置值
row.createCell((short) 0).setCellValue(user_id);
row.createCell((short) 1).setCellValue(login_time);
row.createCell((short) 2).setCellValue(phone);
row.createCell((short) 3).setCellValue(nickname);
row.createCell((short) 4).setCellValue(sex);
row.createCell((short) 5).setCellValue(pn_areaname);
row.createCell((short) 6).setCellValue(pn_opername);
j++;
}
}
// 第六步,将文件存到指定位置,这里放到桌面
FileSystemView fsv = FileSystemView.getFileSystemView();
String deskpath=fsv.getHomeDirectory().toString();
File file=new File(deskpath+"/用户列表.xls");
FileOutputStream fout = new FileOutputStream(file);
wb.write(fout);
fout.close();
return true;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}