Java如何将Joda-Time的DateTime转换为Calendar或Date对象？

这段代码告诉你如何乔达时间的转换DateTime对象为JDK的java.util.Calendar或java.util.Date对象。要转换DateTime为java.util.Date使用toDate()方法，要转换为java.util.Calendar使用toCalendar()方法。

package org.nhooo.example.joda;

import org.joda.time.DateTime;

import java.util.Calendar;
import java.util.Date;
import java.util.Locale;

public class DateTimeToDateCalendarDemo {
    public static void main(String[] args) {
        // 将DateTime对象转换为JDK的Date。
        DateTime dateTime = DateTime.now();
        Date date = dateTime.toDate();
        System.out.println("dateTime = " + dateTime);
        System.out.println("date     = " + date);

        // 将DateTime对象转换为JDK的Calendar。
        Calendar calendar = dateTime.toCalendar(Locale.getDefault());
        System.out.println("calendar = " + calendar);
    }
}

我们的代码片段的结果：

dateTime = 2019-07-22T13:48:13.005+08:00
date     = Mon Jul 22 13:48:13 WITA 2019
calendar = java.util.GregorianCalendar[time=1563774493005,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Asia/Makassar",offset=28800000,dstSavings=0,useDaylight=false,transitions=5,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2019,MONTH=6,WEEK_OF_YEAR=30,WEEK_OF_MONTH=4,DAY_OF_MONTH=22,DAY_OF_YEAR=203,DAY_OF_WEEK=2,DAY_OF_WEEK_IN_MONTH=4,AM_PM=1,HOUR=1,HOUR_OF_DAY=13,MINUTE=48,SECOND=13,MILLISECOND=5,ZONE_OFFSET=28800000,DST_OFFSET=0]

Maven依赖

<!-- https://search.maven.org/remotecontent?filepath=joda-time/joda-time/2.10.3/joda-time-2.10.3.jar -->
<dependency>
    <groupId>joda-time</groupId>
    <artifactId>joda-time</artifactId>
    <version>2.10.3</version>
</dependency>