Windows FILETIME与JAVA Date互转

public class TimeHelper {
	private final static long DIFF_UNIX_WIN_MS = 11644473600000L;
	private final static long MULTIPLE_MS_100NS = 10000;
	
	private TimeHelper() {
		
	}
	
	public static Date Filetime2Date(long llt) {
		llt /= MULTIPLE_MS_100NS;
		llt -= DIFF_UNIX_WIN_MS;
		return new Date(llt);
	}
	public static long Date2Filetime(Date d) {
		long llt;
		
		llt = d.getTime();
		llt += DIFF_UNIX_WIN_MS;
		llt *= MULTIPLE_MS_100NS;
		return llt;
	}
}