Joda-Time v2.9.1 发布，更新如下：
2.9.1 Bug 修复
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- Fix bug introduced by Long.MIN_VALUE and Long.MAX_VALUE changes [#328]
对 2.9 的改进
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- Faster parsing of time-zone identifiers [#282]
- Added Interval.parseWithOffset(String) [#299, #296]
Provides a way to parse the fixed offset in an interval string
- Add DateTimeFormatter methods for StringBuilder [#298]
- Add Russian period translations [#320]
- Add Italian period translations [#312]
- Add Czech period translations [#313]
- Clarify that PeriodFormatterBuilder is in an invalid state once built [#309]
- Allow DateTime and Interval to refer to values at Long.MIN_VALUE and Long.MAX_VALUE [#297, #190]
A DateTime may be created with any millisecond value, however at the very edges there may be
some undesirable effects, for example always using UTC instead of the time-zone
- Better error message for malformed tzdb files [#319]
- Better error message for interval constructor [#321]
2.8 和 2.9 的兼容
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Build system - Yes
Binary compatible - Yes
Source compatible - Yes
Serialization compatible - Yes
Data compatible - Yes
- DateTimeZone data updated to version 2015g
Semantic compatible - Yes
修复 2.9 的bug
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- Fixed to handle JDK 8u60 [#288, #291]
Without this fix, formatting a time-zone will print "+00:00" instead of "GMT" for the GMT time-zone
- Fix parsing of basic form ISO style where year has unnecessary plus sign [#86]
For example, +20151030 will now be correctly parsed as year 2015.
- Fix overflow bug in intervals [#315]详细更新请看：
JodaTime 提供了一组Java类包用于处理包括ISO8601标准在内的date和time。可以利用它把JDK Date和Calendar类完全替换掉，而且仍然能够提供很好的集成。
Joda-Time主要的特点包括：
1. 易于使用:Calendar让获取"正常的"的日期变得很困难，使它没办法提供简单的方法，而Joda-Time能够 直接进行访问域并且索引值1就是代表January。
2. 易于扩展：JDK支持多日历系统是通过Calendar的子类来实现，这样就显示的非常笨重而且事实 上要实现其它日历系统是很困难的。Joda-Time支持多日历系统是通过基于Chronology类的插件体系来实现。
3. 提供一组完整的功能：它打算提供 所有关系到date-time计算的功能．Joda-Time当前支持6种日历系统，而且在将来还会继续添加。有着比JDK Calendar更好的整体性能等等。
下载地址：http://www.joda.org/joda-time/download.html
来自:开源中国社区
