<dependency>

     <groupId>joda-time</groupId>

     <artifactId>joda-time</artifactId>

     <version>2.9.9</version>

 </dependency>

 //方法一：取系统点间

 DateTime dt1 = new DateTime();  

 //方法二：通过java.util.Date对象生成

 DateTime dt2 = new DateTime(new Date());  

 //方法三：指定年月日点分秒生成(参数依次是：年,月,日,时,分,秒,毫秒)

 DateTime dt3 = new DateTime(2012, 5, 20, 13, 14, 0, 0);  

 //方法四：ISO8601形式生成

 DateTime dt4 = new DateTime("2012-05-20");

 DateTime dt5 = new DateTime("2012-05-20T13:14:00");  

 //只需要年月日的时候

 LocalDate localDate = new LocalDate(2009, 9, 6);// September 6, 2009  

 //只需要时分秒毫秒的时候

 LocalTime localTime = new LocalTime(13, 30, 26, 0);// 1:30:26PM  

 DateTime dt = new DateTime();

 //年

 int year = dt.getYear();

 //月

 int month = dt.getMonthOfYear();

 //日

 int day = dt.getDayOfMonth();

 //星期

 int week = dt.getDayOfWeek();

 //点

 int hour = dt.getHourOfDay();

 //分

 int min = dt.getMinuteOfHour();

 //秒

 int sec = dt.getSecondOfMinute();

 //毫秒

 int msec = dt.getMillisOfSecond(); 

 DateTime dt = new DateTime();  

 //星期

 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;

 }  

 DateTime dt = new DateTime();  

 //转换成java.util.Date对象

 Date d1 = new Date(dt.getMillis());

 Date d2 = dt.toDate();  

 //转换成java.util.Calendar对象

 Calendar c1 = Calendar.getInstance();

 c1.setTimeInMillis(dt.getMillis());

 Calendar c2 = dt.toCalendar(Locale.getDefault()); 

 DateTime dt = new DateTime();  

 //昨天

 DateTime yesterday = dt.minusDays(1);

 //明天

 DateTime tomorrow = dt.plusDays(1);

 //1个月前

 DateTime before1month = dt.minusMonths(1);

 //3个月后

 DateTime after3month = dt.plusMonths(3);

 //2年前

 DateTime before2year = dt.minusYears(2);

 //5年后

 DateTime after5year = dt.plusYears(5);  

DateTime d1 = new DateTime("2012-02-01");

DateTime d2 = new DateTime("2012-05-01");  

//和系统时间比

boolean b1 = d1.isAfterNow();

boolean b2 = d1.isBeforeNow();

boolean b3 = d1.isEqualNow();  

//和其他日期比

boolean f1 = d1.isAfter(d2);

boolean f2 = d1.isBefore(d2);

boolean f3 = d1.isEqual(d2); 

 DateTime begin = new DateTime("2012-02-01");

 DateTime end = new DateTime("2012-05-01");  

 //计算区间毫秒数

 Duration d = new Duration(begin, end);

 long time = d.getMillis();  

 //计算区间天数

 Period p = new Period(begin, end, PeriodType.days());

 int days = p.getDays();  

 //计算特定日期是否在该区间内

 Interval i = new Interval(begin, end);

 boolean contained = i.contains(new DateTime("2012-03-01"));  

 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"); 

 public class DateTimeUtil {

     public static final String STANDARD_FORMAT = "yyyy-MM-dd HH:mm:ss";

     public static Date strToDate(String dateTimeStr){

         DateTimeFormatter dateTimeFormatter = DateTimeFormat.forPattern(STANDARD_FORMAT);

         DateTime dateTime = dateTimeFormatter.parseDateTime(dateTimeStr);

         return dateTime.toDate();

     }

     public static String dateToStr(Date date){

         if (date == null){

             return StringUtils.EMPTY;

         }

         DateTime dateTime = new DateTime(date);

         return dateTime.toString(STANDARD_FORMAT);

     }

 }