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));
	}
}