有没有哪位大哥对POI熟？

      
       case HSSFCell.CELL_TYPE_NUMERIC:
         double d = cell.getNumericCellValue();
         // test if a date!
         if (HSSFDateUtil.isCellDateFormatted(cell)) {
           // format in form of M/D/YY
           cal.setTime(HSSFDateUtil.getJavaDate(d));
           cellText =
             (String.valueOf(cal.get(Calendar.YEAR))).substring(2);
           cellText = cal.get(Calendar.MONTH)+1 + "/" +
                      cal.get(Calendar.DAY_OF_MONTH) + "/" +
                      cellText;
         } 
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