/**
	 * 返回的字符串形式是形如：2013-10-20 20:58
	 * */
	public static String formatTimeInMillis(long timeInMillis) {
		Calendar cal = Calendar.getInstance();
		cal.setTimeInMillis(timeInMillis);
		Date date = cal.getTime();
		SimpleDateFormat dateFormat = new SimpleDateFormat(
				"yyyy-MM-dd HH:mm:ss");
		String fmt = dateFormat.format(date);

		return fmt;
	}