java时间

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/*
*0点到24点
*/
public class Date {
public static void main(String[] args) {
Calendar c = Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY, 0);//时
c.set(Calendar.MINUTE, 0);//分
c.set(Calendar.SECOND, 0);//秒
c.set(Calendar.MILLISECOND, 0);//毫秒
Date d1 = c.getTime();
c.set(Calendar.DAY_OF_MONTH,c.get(Calendar.DAY_OF_MONTH ) + 1);
Date d2 = c.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss sss");
System.out.println(sdf.format(d1));
System.out.println(sdf.format(d2));
}
}