日历无法正确设置小时

Question

如果我想将时间设置为00:00:00，则日历始终为12:00:00

Calendar currentDate = Calendar.getInstance();
// even set AM_PM it was still 12:00:00
// currentDate.set(Calendar.AM_PM, Calendar.AM);
// Calendar.HOUR still not work
currentDate.set(Calendar.HOUR_OF_DAY, 0);
currentDate.set(Calendar.MINUTE, 0);
currentDate.set(Calendar.SECOND, 0);
currentDate.set(Calendar.MILLISECOND, 0); 

我怎么能做到？提前谢谢。

Answer 1

但是到了00:00:00，真的，当你到达它的时候？是今天吗？还是昨天？

要消除混淆，请尝试

之类的内容

Calendar currentDate = Calendar.getInstance();
// even set AM_PM it was still 12:00:00
// currentDate.set(Calendar.AM_PM, Calendar.AM);
// Calendar.HOUR still not work
currentDate.set(Calendar.HOUR_OF_DAY, 0);
currentDate.set(Calendar.MINUTE, 0);
currentDate.set(Calendar.SECOND, 1);
currentDate.set(Calendar.MILLISECOND, 0); 

Answer 2

您可以像这样设置小时：

SimpleDateFormat sdf = new SimpleDateFormat("yyyy MMM dd HH:mm:ss");

Calendar calendar = new GregorianCalendar(2014, 4, 15, 0, 0, 0);

System.out.println(sdf.format(calendar.getTime()));

<强>输出

2014 mai 15 00:00:00

mai表示法语may个月。