Joda Time 使用

Posted 2020-10-26 王坤1993

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title: Joda Time 使用
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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