poi excel单元格的校验

switch (cell.getCellType()) {
    case HSSFCell.CELL_TYPE_NUMERIC://数值类型
        if (0 == cell.getCellType()) {
            if (HSSFDateUtil.isCellDateFormatted(cell)) {
                Date date = cell.getDateCellValue();
                DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                cellValue = formatter.format(date);
            } else {
　　　　　　　　　//存储整型类型的数据
                double doubleValue = cell.getNumericCellValue();
                long longValue = Math.round(doubleValue);
                if (Double.parseDouble(longValue + ".0") == doubleValue) {
                    cellValue = longValue + "";
                } else {
                    cellValue = doubleValue + "";
                }
            }
        }
        break;
    case HSSFCell.CELL_TYPE_STRING://字符串
        cellValue = cell.getStringCellValue();
        break;
    case HSSFCell.CELL_TYPE_BOOLEAN://boolean值
        cellValue = cell.getBooleanCellValue() + "";
        break;
    case HSSFCell.CELL_TYPE_FORMULA:
        cellValue = cell.getCellFormula() + "";
        break;
    case HSSFCell.CELL_TYPE_BLANK://空值
        cellValue = "";
        break;
    case HSSFCell.CELL_TYPE_ERROR://错误
        cellValue = "非法字符";
        break;
    default:
        cellValue = "未知类型";
        break;
}