/**

      * excel导出

      * @param req

      * @param resp

      * void

      * @throws IOException

      */

     private void exportAccountData(HttpServletRequest req,

             HttpServletResponse resp) throws IOException {

         String sql=" select id,aname,type,money,remark,create_time as createTime,update_Time as updateTime from account "

                 + "  where user_id=?";

         User user=(User) req.getSession().getAttribute("user");

         List<Account> list=MyBaseDao.queryRows(sql, new Object[]{user.getId()}, Account.class);

         if(null!=list&&list.size()>0){

             String fileName="账户数据.xls";

             resp.setHeader("Content-disposition","attachment;filename="

                 +new String(fileName.getBytes("gb2312"),"ISO8859-1"));    //设置文件头编码格式

             resp.setContentType("APPLICATION/OCTET-STREAM;charset=UTF-8");//设置类型

             resp.setHeader("Cache-Control","no-cache");//设置头

             resp.setDateHeader("Expires", 0);//设置日期头

             HSSFWorkbook book=new HSSFWorkbook();

             HSSFSheet sheet=book.createSheet();

             CellStyle cellStyle=book.createCellStyle();

             cellStyle.setDataFormat(book.createDataFormat().getFormat("yyyy-MM-dd"));

             for(int i=0;i<list.size();i++){

                 Account account=list.get(i);

                 Row row=sheet.createRow(i);

                 Cell cell1=row.createCell(0);

                 cell1.setCellValue(account.getId());

                 Cell cell2=row.createCell(1);

                 cell2.setCellValue(account.getAname());

                 Cell cell3=row.createCell(2);

                 cell3.setCellValue(account.getMoney());

                 Cell cell4=row.createCell(3);

                 cell4.setCellValue(account.getType());

                 Cell cell5=row.createCell(4);

                 cell5.setCellValue(account.getRemark());

                 Cell cell6=row.createCell(5);

                 cell6.setCellValue(account.getCreateTime());

                 cell6.setCellStyle(cellStyle);

                 Cell cell7=row.createCell(6);

                 cell7.setCellStyle(cellStyle);

                 cell7.setCellValue(account.getUpdateTime());

             }        

             book.write(resp.getOutputStream());

             resp.getOutputStream().flush();

             resp.getOutputStream().close();

         }

     }