java日期

public class DateUtil{
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
        Date date = new Date();
        System.out.println(sdf.format(date)+"========"+date.getTime());
        //这种增加好像只能增加到一个月之内~~~
        Date date2 = new Date(date.getTime()+1000*60*60*24*20);
        System.out.println(sdf.format(date2)+"========="+date2.getTime());
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.DATE, 100);
        Date date3 = calendar.getTime();
        System.out.println(sdf.format(date3));
}
               

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