时间的大小比较
1.Date的getTime方法,来获取时间,然后对两个时间进行比较。
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); Date oldDate1 = format.parse("2017-03-12 59:16:00"); Date oldDate2 = format.parse("2018-02-06 23:16:00"); if(d1.getTime() > d2.getTime()){ return 1; }else if(d1.getTime() < d2.getTime()){ return -1; }else{ return 0; }
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); Date oldDate1 = format.parse("2017-03-12 59:16:00"); Date oldDate2 = format.parse("2018-02-06 23:16:00"); long day=num/(24*60*60*1000); long hour=(num/(60*60*1000)-day*24); long min=((num/(60*1000))-day*24*60-hour*60); long s=(num/1000-day*24*60*60-hour*60*60-min*60); System.out.println(""+day+"天"+hour+"小时"+min+"分"+s+"秒");
2.Date中compareTo的用法。也是比较时间大小的,相等返回0,大于返回1,小于返回-1
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); Date oldDate1 = format.parse("2017-03-12 59:16:00"); Date oldDate2 = format.parse("2018-02-06 23:16:00"); System.out.println(oldDate1.compareTo(oldDate2));