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();
从JodaTime 2.3开始，toDateMidnight()已弃用。
从2.2升级到2.3
Deprecations since 2.2
----------------------
- DateMidnight [#41]
This class is flawed in concept
The time of midnight occasionally does not occur in some time-zones
This is a result of a daylight savings time from 00:00 to 01:00
DateMidnight is essentially a DateTime with a time locked to midnight
Such a concept is more generally a poor one to use, given LocalDate
Replace DateMidnight with LocalDate
Or replace it with DateTime, perhaps using the withTimeAtStartOfDay() method
下面是一个没有toDateMidnight()方法的示例代码。
Code
DateTime todayAtMidnight = new DateTime().withTimeAtStartOfDay();
System.out.println(todayAtMidnight.toString("yyyy-MM-dd HH:mm:ss"));
输出(根据您所在的时区可能有所不同)
2013-09-28 00:00:00
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();
}
