http://georgeinfo.blog.163.com/blog/static/16368334120101019104044650/

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These days when you find me working in Java, you’ll find me working in NetBeans. If I wanted to spend my time manually editing ant scripts, you’d probably find me working in vi instead.

I
needed to add a file to META-INF in my application jar a few days ago.
NetBeans provides a META-INF folder in the project window for web
applications, but not for standalone java applications. There is a lot
of documentation for this specific problem that will help you edit your
build script to get this done but for something so basic I prefer a
simpler solution.

After some experimentation I found an alternative:

1. open the project window
2. right-click on “Source Package”, click “New”, and choose “Folder” under the “Other” category
3. name the new folder “META-INF”
4. add files (.mailcap in my case) to this folder
5. build as usual
6. open your jar, browse to META-INF, and note that your files are now where they belong

Please
note that I’m using NetBeans 6.5, and that this method could suddenly
stop working in some future version of NetBeans if the build process
changes dramatically.

If you have an alternative to this
process that does not require build script modification, I would very
much like to hear from you!