Java里得到00:00:00格式的时分秒的Timestamp

import java.sql.timestamp;
import java.text.simpledateformat;
import java.util.timezone;
public class test {
public static void main(string[] args) {
simpledateformat sdf = new simpledateformat("yyyy-mm-dd hh:mm:ss");
long t = system.currenttimemillis();
t = t / (1000 * 3600 * 24) * (1000 * 3600 * 24);
system.out.println(sdf.format(new timestamp(t)));
t = system.currenttimemillis();
t = t / (1000 * 3600 * 24) * (1000 * 3600 * 24) - timezone.getdefault().getrawoffset();
system.out.println(sdf.format(new timestamp(t)));
}
}

如果不扣掉时区偏移，那么时间将是北京默认的东8区(gmt+8)