wimxa@yahoo.com wrote in news:1189796859.311184.272020
@k79g2000hse.googlegroups.com:

<snip>
A jar file is basically a zip file with a manifest file stored within it.  
If you have a tool that manipulates zip files, you should be able to do
anything to a jar file that you can do to a zip file.
You might have to change the file extension to zip, and later back to jar.

Because of the way that data is stored in a zip file, what you are
requesting probably requires that:
1) The file be unzipped or unjarred (a tool might do this to a temporary
location).
2) The directory be renamed.
3) The files get zipped or jarred again, this time starting from the
renamed point of the directory tree instead of from the top.

Because the java package java.util.jar provides support for jar files, it
might be easy to write a small utility that performs this task for you.  It
may even be possible to do it in a streaming fashion without the need for a
temporary location.

<!-- must spell out each extra file individually to be included in the
jar -->
<resource file="com/mindprod/bio/adano.jpg" package="com.mindprod.bio"
/>
<resource file="com/mindprod/bio/lclogo.jpg"
package="com.mindprod.bio" />

You specify where the file is, and what package you want the resource
packed under in the jar.

If you specify the files using <zipfileset>s within the <jar> task, this
has attributes for specifying a "prefix" to used on all the filenames or
the "fullpath" to be used for an individual file. Might be what you're
looking for.