如何创建今天午夜和明天午夜的Java日期对象?

在我的代码中，我需要找到今天发生的所有事情。因此，我需要将今天凌晨00:00(今天凌晨午夜)到中午12:00(今晚午夜)的日期进行比较。

我知道……

Date today = new Date();

．.．我现在很生气。和…

Date beginning = new Date(0);

…1970年1月1日是零。但是有什么简单的方法可以让你今天和明天的时间都为零呢?

更新

我做到了，但肯定有更简单的方法吧?

Calendar calStart = new GregorianCalendar();
calStart.setTime(new Date());
calStart.set(Calendar.HOUR_OF_DAY, 0);
calStart.set(Calendar.MINUTE, 0);
calStart.set(Calendar.SECOND, 0);
calStart.set(Calendar.MILLISECOND, 0);
Date midnightYesterday = calStart.getTime();
            
Calendar calEnd = new GregorianCalendar();
calEnd.setTime(new Date());
calEnd.set(Calendar.DAY_OF_YEAR, calEnd.get(Calendar.DAY_OF_YEAR)+1);
calEnd.set(Calendar.HOUR_OF_DAY, 0);
calEnd.set(Calendar.MINUTE, 0);
calEnd.set(Calendar.SECOND, 0);
calEnd.set(Calendar.MILLISECOND, 0);
Date midnightTonight = calEnd.getTime();

当前回答

Apache Commons Lang

DateUtils.isSameDay(date1, date2)

http://commons.apache.org/proper/commons lang/javadocs/api - 2.6 - / - org/apache/commons/lang/time/dateutils.html # isSameDay (java.util.Date java.util.Date)

2013-04-02 13:24:44

其他回答

JDK8 - Java时间模块方式:

LocalDateTime todayMidnight = LocalDate.now（）.atStartOfDay（）;

也工作:

LocalDateTime todayMidnight = LocalDateTime.now（）.with（LocalTime.MIDNIGHT）;

2020-12-13 15:27:56

和之前的答案差不多，但是没有人提到AM_PM参数:

    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.HOUR, 0);
    cal.set(Calendar.MINUTE, 0);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MILLISECOND, 0);
    cal.set(Calendar.AM_PM, Calendar.AM);

2018-04-08 11:29:48

这些方法将帮助你

public static Date getStartOfDay(Date date) {
     Calendar calendar = Calendar.getInstance();
     calendar.setTime(date);
     calendar.set(Calendar.HOUR_OF_DAY, 0);
     calendar.set(Calendar.MINUTE, 0);
     calendar.set(Calendar.SECOND, 0);
     calendar.set(Calendar.MILLISECOND, 0);
     return calendar.getTime();
 }

and

public static Date getEndOfDay(Date date) {
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(date);
    calendar.set(Calendar.HOUR_OF_DAY, 23);
    calendar.set(Calendar.MINUTE, 59);
    calendar.set(Calendar.SECOND, 59);
    calendar.set(Calendar.MILLISECOND, 999);
    return calendar.getTime();
}

2015-12-09 13:28:53

使用apache commons..

//For midnight today 
Date today = new Date(); 
DateUtils.truncate(today, Calendar.DATE);

//For midnight tomorrow   
Date tomorrow = DateUtils.addDays(today, 1); 
DateUtils.truncate(tomorrow, Calendar.DATE);

2018-11-16 05:07:23

Apache Commons Lang

DateUtils.isSameDay(date1, date2)

http://commons.apache.org/proper/commons lang/javadocs/api - 2.6 - / - org/apache/commons/lang/time/dateutils.html # isSameDay (java.util.Date java.util.Date)

2013-04-02 13:24:44

如何创建今天午夜和明天午夜的Java日期对象?

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