how to replace a jar in another jar file?

Question

I am trying to replace a modified property.jar in WAS.jar, what's the quickest way to do this? Replacing normal files back to a jar is very easily by using input/output stream. How can I do it with jar/ear types?

Please advise, thanks

What's the difference between the .jar file and any other file type? — weekens, Apr 25 '11 at 10:28

score 1 · Accepted Answer · edited May 23 '17 at 12:13

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Maybe this could help you?

edited May 23 '17 at 12:13

Community

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answered Apr 25 '11 at 10:31

weekens

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score 0 · Answer 2 · answered Apr 25 '11 at 09:56

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Three steps:

Unpack the JAR you want to change
Make your changes
Re-JAR it

I'm not saying that this is a good idea. I don't see why you should have to do such a thing. Don't consider supplying the steps as an endorsement.

answered Apr 25 '11 at 09:56

duffymo

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re-jar is bad idea because you will need to use all classpath and manifest etc. again – Tom Apr 26 '11 at 15:48

score 0 · Answer 3 · answered Apr 25 '11 at 10:34

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jar and ear files are zip-files. What you need to do is equivalent to replacing an entry in a zip-file.

answered Apr 25 '11 at 10:34

Thorbjørn Ravn Andersen

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Just those you want to replace. – Thorbjørn Ravn Andersen Apr 26 '11 at 20:24

how to replace a jar in another jar file?

3 Answers3