//如excel 中2013-01-04 18:30:12 PM    解析后的这列cell 传入此方法  将返回  2013-01-04 18:30:12

public static String FormateTime(Cell formatecell) {

    try {

        java.util.Date mydate = null;

        DateCell datecll = (DateCell) formatecell;

        mydate = datecll.getDate();

        long time = (mydate.getTime() / 1000) - 60 * 60 * 8;

        mydate.setTime(time * 1000);

        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        return formatter.format(mydate);

    } catch (Exception e) {

        e.printStackTrace();

        return null;

    }

}