Joda-time是java处理时间非常棒的jar

http://www.joda.org/joda-time/

maven:

<dependency>
  <groupId>joda-time</groupId>
  <artifactId>joda-time</artifactId>
  <version>2.9.1</version>
</dependency>

http://h819.iteye.com/blog/611099