java获取今天、明天的凌晨时间

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


/**
 * 获取今天的凌晨时间
 */
public class 获取时间 {

    public static void main(String[] args) {
        Calendar cal = Calendar.getInstance();
        cal.add(cal.DATE,0);
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
        Date beginOfDate = cal.getTime();
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println ("===:"+formatter.format(beginOfDate) );
    }
}

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

/**
 * 获取明天的凌晨时间
 */
public class 获取时间 {

    public static void main(String[] args) {
        Calendar cal = Calendar.getInstance();
        cal.add(cal.DATE,1);
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
        Date beginOfDate = cal.getTime();
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println ("===:"+formatter.format(beginOfDate) );
    }
}