Joda Time 使用

Joda Time 使用

对于系统的一些时间操作很是不方便,为了方便转化,有时候用date,有时候用timestmp,有时候用calendar,忍不住想更改了.

但是任务巨大,先把笔记收藏了,后面有机会再更改了.下面只是几个使用的例子.

1、 获取今天的开始时间：比如：2014-06-19 00:00:00

		//joda
		DateTime nowTime = new DateTime();
		DateTime startOfDay =  nowTime.withTimeAtStartOfDay();

		//jdk
		Calendar c1 = Calendar.getInstance();
        c1.setTimeInMillis(timeInMs);
        c1.set(Calendar.HOUR_OF_DAY, 0);
        c1.set(Calendar.MINUTE, 0);
        c1.set(Calendar.SECOND, 0);
        c1.set(Calendar.MILLISECOND, 0);
        return c1.getTimeInMillis();

2、 获取今天的结束时间：比如：2014-06-19 23:59:59

		//joda
		DateTime nowTime = new DateTime();
		DateTime endOfDay =  nowTime.millisOfDay().withMaximumValue();

		//jdk
		Calendar c1 = Calendar.getInstance();
        c1.setTimeInMillis(timeInMs);
        c1.set(Calendar.HOUR_OF_DAY, 23);
        c1.set(Calendar.MINUTE, 59);
        c1.set(Calendar.SECOND, 59);
        c1.set(Calendar.MILLISECOND, 0);
        return c1.getTimeInMillis();

3、 获取现在距离今天结束还有多长时间

		//joda
		DateTimenowTime = new DateTime();
		DateTime endOfDay = nowTime.millisOfDay().withMaximumValue();
		endOfDay.getMillis()-nowTime.getMillis()

4、 计算两个日期的相隔天数

• JodaTime

		//joda
		DateTime nowTime = new DateTime();
		DateTime futureTime = new DateTime(2015, 10, 1, 0, 0, 0);
		Int days = Days.daysBetween(nowTime, futureTime).getDays();

		//jdk
		public static int getBetweenDay(long startTime, long endTime) {
			Calendar start = Calendar.getInstance();
			start.setTimeInMillis(startTime);
			Calendar end = Calendar.getInstance();
			end.setTimeInMillis(endTime);
			return (int) ((end.getTimeInMillis() - start.getTimeInMillis()) / 86400000);
		}

5、 创建任意时间对象

		//Joda-time
		DateTime dateTime=new DateTime(2012, 12, 15, 18, 23,55); 

		//jdk
		Calendar calendar=Calendar.getInstance();
		calendar.set(2012, Calendar.NOVEMBER, 15, 18, 23,55);

6、 与JDK互操作

		//通过jdk时间对象构造
		Date date = new Date();
		DateTime dateTime = new DateTime(date);  

		Calendar calendar = Calendar.getInstance();
		dateTime = new DateTime(calendar);  

		// Joda-time 各种操作.....
		dateTime = dateTime.plusDays(1) // 增加天
							.plusYears(1)// 增加年
							.plusMonths(1)// 增加月
							.plusWeeks(1)// 增加星期
							.minusMillis(1)// 减分钟
							.minusHours(1)// 减小时
							.minusSeconds(1);// 减秒数  

		// 计算完转换成jdk 对象
		Date date2 = dateTime.toDate();
		Calendar calendar2 = dateTime.toCalendar(Locale.CHINA);

7、 加上90天后输出

		//joda
		DateTime dateTime = new DateTime(2000, 1, 1, 0, 0, 0, 0);
		System.out.println(dateTime.plusDays(90).toString("E MM/dd/yyyy HH:mm:ss.SSS");

		jdk
		Calendar calendar = Calendar.getInstance();
		calendar.set(2000, Calendar.JANUARY, 1, 0, 0, 0);
		SimpleDateFormat sdf =
		  new SimpleDateFormat("E MM/dd/yyyy HH:mm:ss.SSS");
		calendar.add(Calendar.DAY_OF_MONTH, 90);
		System.out.println(sdf.format(calendar.getTime()));

8、 时间的输出显示

		//通过标准的 ISO-8601输出
		DateTime dateTime = SystemFactory.getClock().getDateTime();
		dateTime.toString(ISODateTimeFormat.basicDateTime());
		dateTime.toString(ISODateTimeFormat.basicDateTimeNoMillis());
		dateTime.toString(ISODateTimeFormat.basicOrdinalDateTime());
		dateTime.toString(ISODateTimeFormat.basicWeekDateTime());

		//传递 SimpleDateFormat字符串输出
		DateTime dateTime = SystemFactory.getClock().getDateTime();
		dateTime.toString("MM/dd/yyyy hh:mm:ss.SSSa");
		dateTime.toString("dd-MM-yyyy HH:mm:ss");
		dateTime.toString("EEEE dd MMMM, yyyy HH:mm:ssa");
		dateTime.toString("MM/dd/yyyy HH:mm ZZZZ");
		dateTime.toString("MM/dd/yyyy HH:mm Z");

		//输出的结果如下:
		20090906T080000.000-0500
		20090906T080000-0500
		2009249T080000.000-0500
		2009W367T080000.000-0500

		09/06/2009 02:30:00.000PM
		06-Sep-2009 14:30:00
		Sunday 06 September, 2009 14:30:00PM
		09/06/2009 14:30 America/Chicago
		09/06/2009 14:30 -0500

参考的博客

Joda Time 使用 - CSDN博客

http://blog.csdn.net/zeus_9i/article/details/32318771

Overview (Joda-Time 2.9.9 API)

http://www.joda.org/joda-time/apidocs/

强大易用的日期和时间库 Joda Time - 坚持而不浮躁 - ITeye博客

http://persevere.iteye.com/blog/1755237

Joda-Time 简介

https://www.ibm.com/developerworks/cn/java/j-jodatime.html

Releases · JodaOrg/joda-time(github架包和源码地址)

https://github.com/JodaOrg/joda-time/releases