如何使用Apache DateUtils從第一天到最後一天使用time [JAVA]獲取前一個月？

Question

如果輸入是今天（6月7日），那麼它應該給我5月1日上午12:00至5月31日晚上11:59。 我正在使用日曆，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()); 

Answer 1

我結束了使用JodaTime。更容易！

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); 

Answer 2

DateUtils可以做必要的：

Date lastmonth = DateUtils.addMonths(new Date(), -1); 
System.out.println(lastmonth); 
System.out.println(DateUtils.truncate(lastmonth, Calendar.MONTH)); 
System.out.println(DateUtils.addMinutes(DateUtils.ceiling(lastmonth, Calendar.MONTH), -1)); 

編輯：添加輸出

Sat May 07 23:06:05 AST 2016 
Sun May 01 00:00:00 AST 2016 
Tue May 31 23:59:00 AST 2016