如果输入的是今天（6月7日），则应该给我5月1日12:00 AM到5月31日11:59 PM。我正在使用日历，但我想使用DateUtils。
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_MONTH, -1);
calendar.set(Calendar.HOUR,23);
calendar.set(Calendar.MINUTE,59);
calendar.set(Calendar.SECOND,59);
System.out.println("Last date of month: " + calendar.getTime());
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.set(Calendar.HOUR, 12);
calendar.set(Calendar.MINUTE,00);
calendar.set(Calendar.SECOND,00);
System.out.println("fir stdate of month: " + calendar.getTime());
我最终使用了JodaTime。容易得多！
MutableDateTime dateTime = new MutableDateTime();
System.out.println("CurrentTime " + dateTime);
dateTime.addMonths(-1); //last Month
dateTime.setMinuteOfDay(0);
dateTime.setSecondOfMinute(0);
dateTime.setHourOfDay(12);
dateTime.setDayOfMonth(1); //first Day of last Month
System.out.println("first Day Time " + dateTime);
dateTime.setDayOfMonth(dateTime.dayOfMonth().getMaximumValue()); //set Day to last Day of that month
dateTime.setMinuteOfDay(59);
dateTime.setSecondOfMinute(59);
dateTime.setHourOfDay(23); //time set to night time 11:59:59
System.out.println("last Day Time " + dateTime);
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我来说两句