使用Joda-Time 处理时间真的好方便！！！

既然无法摆脱时间，为何不设法简化时间处理？

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

import org.joda.time.DateTime;
import java.util.Calendar;
import java.util.Date;

public class JodaTimeTest {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance();
        
        DateTime dateTime = new DateTime(new Date());
        DateTime dateTime_1 = dateTime.plusMonths(1).plusDays(3).plusHours(-8);//随便++--日期，想怎么操作怎么操作
        System.out.println(dateTime_1.toString("yyyy-MM-dd HH:mm:ss"));  //toString转为字符串的时候，可以执行你想要输出的格式。
        
        calendar.setTime(dateTime_1.toDate());//可以和jdk原生的日期类互操作
    }
}

代码实例：

public static String formatDateFriendly(Date d) {
    if (null == d) {
        return "";
    }
    return new DateTime(d).toString("yyyy年MM月dd日");
}

public static String formatDateTime(Date d) {
    if (null == d) {
        return "";
    }
    return new DateTime(d).toString("yyyy-MM-dd HH:mm:ss");
}

public static String formatTimestamp(Date d) {
    if (null == d) {
        return "";
    }
    return new DateTime(d).toString("yyyyMMddHHmmssSSS");
}

public static String formatTime(Date d) {
    if (null == d) {
        return "";
    }
    return new DateTime(d).toString("HH:mm:ss");
}

public static String formatDate(Date d) {
    if (null == d) {
        return "";
    }
    return new DateTime(d).toString("yyyy-MM-dd");
}

public static String formatSimDate(Date d) {
    if (null == d) {
        return "";
    }
    return new DateTime(d).toString("yyyyMMdd");
}

public static String formatSimMonth(Date d) {
    if (null == d) {
        return "";
    }
    return new DateTime(d).toString("yyyyMM");
}

public static Date parseDate(String s) throws ParseException {
    if (null == s) {
        return null;
    }
    if (s.length() == 10) {
        return DateTime.parse(s).toDate();
    }
    return DateTime.parse(s, DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss")).toDate();
}

public static void main(String[] args) throws Exception {
    System.out.println(parseDate("1988-02-24"));
    System.out.println(parseDate("1988-02-24 11:00:00"));
    System.out.println(formatTimestamp(new Date()));
}