public static String formatTime(long diffLongTime) {
		StringBuffer buf = new StringBuffer();
		long hours = diffLongTime / (60 * 60 * 1000);
		long rem = (diffLongTime % (60 * 60 * 1000));
		long minutes = rem / (60 * 1000);
		rem = rem % (60 * 1000);
		long seconds = rem / 1000;

		if (hours != 0) {
			buf.append(hours);
			buf.append("시간 ");
		}
		if (minutes != 0) {
			buf.append(minutes);
			buf.append("분 ");
		}
		// 차이가 없다면 0을 반환한다.
		buf.append(seconds);
		buf.append("초");
		return buf.toString();
	}