GenJar replacement or update?

"GenJar is a specialized Ant task that 开发者_运维技巧builds jar files based on class dependencies rather than simply the contents of a directory" (http://genjar.sourceforge.net/)

It is really useful, but the project seems to be un-active since "2003-03-06 GenJar 1.0.2 is released".

Is there a new tool for that we should use now?

Thanks

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genjar2 seems to be the "official" replacement: http://code.google.com/p/genjar2/

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How about maven http://maven.apache.org/?