Java工具类：获取long型唯一ID

import java.text.SimpleDateFormat;import java.util.Date;/**
* 获取long型唯一ID */public class ID
{    private static long tmpID = 0;    private static boolean tmpIDlocked = false;    public static long getId()
{        long ltime = 0;        while (true)
{            if(tmpIDlocked == false)
{
tmpIDlocked = true;                //当前：（年、月、日、时、分、秒、毫秒）*10000
ltime = Long.valueOf(new SimpleDateFormat("yyMMddhhmmssSSS").format(new Date()).toString()) * 10000;                if(tmpID < ltime)
{
tmpID = ltime;
}                else
{
tmpID = tmpID + 1;
ltime = tmpID;
}
tmpIDlocked = false;                return ltime;
}
}
}
}