一、前言

对于Joda-Time中Date-Time的dayOfWeek,dayOfMonth日期计算的方法，一开始感觉没有那么好理解，那么通过代码实践来更好的理解一下这些日期计算方法。

二、正文

1992-11-10 09:08:07 日期计算

       DateTimeFormatter formatter = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss");
        DateTime dateTime = formatter.parseDateTime("1992-11-10 09:08:07");
        //星期二
        String dayOfWeek = dateTime.dayOfWeek().getAsShortText();
        //10
        String dayOfMonth = dateTime.dayOfMonth().getAsShortText();
        //315
        String dayOfYear = dateTime.dayOfYear().getAsShortText();
        //9
        String hourOfDay = dateTime.hourOfDay().getAsShortText();
        //十一月
        String monthOfYear = dateTime.monthOfYear().getAsShortText();
        //8
        String minuteOfHour = dateTime.minuteOfHour().getAsShortText();
        //7
        String secondOfMinute = dateTime.secondOfMinute().getAsShortText();
        //32887
        String secondOfDay = dateTime.secondOfDay().getAsShortText();
        //46
        String weekOfWeekyear = dateTime.weekOfWeekyear().getAsShortText();
        //1992
        String weekyear = dateTime.weekyear().getAsShortText();
        //1992
        String yearOfEra = dateTime.yearOfEra().getAsShortText();

• dayOfWeek 星期几
• dayOfMonth 哪天
• dayOfYear 哪天（年）
• hourOfDay 几点
• monthOfYear 几月
• minuteOfHour 几分
• secondOfMinute 几秒
• secondOfDay 几秒（天）
• weekOfWeekyear 几周（年）
• yearOfEra 几公元年