http://rensanning.iteye.com/blog/1546652
Joda-Time提供了一组Java类包用于处理包括ISO8601标准在内的date和time。可以利用它把JDK Date和Calendar类完全替换掉，而且仍然能够提供很好的集成。
http://joda-time.sourceforge.net/
版本：joda-time-2.1.jar
1、时间类得作成
- DateTime dt1 = new DateTime();
-
- DateTime dt2 = new DateTime(new Date());
-
- DateTime dt3 = new DateTime(2012, 5, 20, 13, 14, 0, 0);
-
- DateTime dt4 = new DateTime("2012-05-20");
- DateTime dt5 = new DateTime("2012-05-20T13:14:00");
-
- LocalDate localDate = new LocalDate(2009, 9, 6);
-
- LocalTime localTime = new LocalTime(13, 30, 26, 0);
2、获取年月日点分秒
- DateTime dt = new DateTime();
- int year = dt.getYear();
- int month = dt.getMonthOfYear();
- int day = dt.getDayOfMonth();
- int week = dt.getDayOfWeek();
- int hour = dt.getHourOfDay();
- int min = dt.getMinuteOfHour();
- int sec = dt.getSecondOfMinute();
- int msec = dt.getMillisOfSecond();
3、星期的特殊处理
- DateTime dt = new DateTime();
-
- switch(dt.getDayOfWeek()) {
- case DateTimeConstants.SUNDAY:
- System.out.println("星期日");
- break;
- case DateTimeConstants.MONDAY:
- System.out.println("星期一");
- break;
- case DateTimeConstants.TUESDAY:
- System.out.println("星期二");
- break;
- case DateTimeConstants.WEDNESDAY:
- System.out.println("星期三");
- break;
- case DateTimeConstants.THURSDAY:
- System.out.println("星期四");
- break;
- case DateTimeConstants.FRIDAY:
- System.out.println("星期五");
- break;
- case DateTimeConstants.SATURDAY:
- System.out.println("星期六");
- break;
- }
4、与JDK日期对象的转换
- DateTime dt = new DateTime();
-
- Date d1 = new Date(dt.getMillis());
- Date d2 = dt.toDate();
-
- Calendar c1 = Calendar.getInstance();
- c1.setTimeInMillis(dt.getMillis());
- Calendar c2 = dt.toCalendar(Locale.getDefault());
5、日期前后推算
- DateTime dt = new DateTime();
-
- DateTime yesterday = dt.minusDays(1);
- DateTime tomorrow = dt.plusDays(1);
- DateTime before1month = dt.minusMonths(1);
- DateTime after3month = dt.plusMonths(3);
- DateTime before2year = dt.minusYears(2);
- DateTime after5year = dt.plusYears(5);
6、取特殊日期
- DateTime dt = new DateTime();
-
- DateTime lastday = dt.dayOfMonth().withMaximumValue();
-
- DateTime firstday = dt.plusDays(90).dayOfWeek().withMinimumValue();
7、时区
- DateTimeZone.setDefault(DateTimeZone.forID("Asia/Tokyo"));
- DateTime dt1 = new DateTime();
-
- DateTime dt2 = new DateTime(DateTimeZone.forID("Europe/London"));
8、计算区间
- DateTime begin = new DateTime("2012-02-01");
- DateTime end = new DateTime("2012-05-01");
-
- Duration d = new Duration(begin, end);
- long time = d.getMillis();
-
- Period p = new Period(begin, end, PeriodType.days());
- int days = p.getDays();
-
- Interval i = new Interval(begin, end);
- boolean contained = i.contains(new DateTime("2012-03-01"));
9、日期比较
- DateTime d1 = new DateTime("2012-02-01");
- DateTime d2 = new DateTime("2012-05-01");
-
- boolean b1 = d1.isAfterNow();
- boolean b2 = d1.isBeforeNow();
- boolean b3 = d1.isEqualNow();
-
- boolean f1 = d1.isAfter(d2);
- boolean f2 = d1.isBefore(d2);
- boolean f3 = d1.isEqual(d2);
10、格式化输出
- DateTime dateTime = new DateTime();
-
- String s1 = dateTime.toString("yyyy/MM/dd hh:mm:ss.SSSa");
- String s2 = dateTime.toString("yyyy-MM-dd HH:mm:ss");
- String s3 = dateTime.toString("EEEE dd MMMM, yyyy HH:mm:ssa");
- String s4 = dateTime.toString("yyyy/MM/dd HH:mm ZZZZ");
- String s5 = dateTime.toString("yyyy/MM/dd HH:mm Z");
Jodd的JDateTime也提供了很不错的时间API。
参考资料：http://www.ibm.com/developerworks/cn/java/j-jodatime.html
Java日期计算之Joda-Time
原文：http://www.cnblogs.com/kxxx/p/5899320.html
