2020-03-11

关于日期。。。

1.求日期间隔

Period period=Period.between(date1, date2);  ----日期之差

System.out.println(period.getYears());

    System.out.println(period.getMonths());

    System.out.println(period.getDays());

    System.out.println(period.toTotalMonths())

Duration d4 = Duration.between(date1, date2)；----时间量之差

Duration d1 = Duration.between(time1, time2);

    Duration d2 = Duration.between(dateTime1, dateTime2);

    Duration d3 = Duration.between(instant1, instant2);

System.out.println("LocalTime持续秒数:" + d1.getSeconds());

    System.out.println("LocalDateTime持续秒数:" + d2.getSeconds());

    System.out.println("Instant持续秒数" + d3.getSeconds());

使用duration时的报错：

unspported unit seconds:此时提醒不支持秒  这个时候需要换period来取时间之差

获取十分钟前的时间
Date now = new Date();

Date now_10 = new Date(now.getTime() - 600000); //10分钟前的时间

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//可以方便地修改日期格式

String nowTime_10 = dateFormat.format(now_10);