Tutorial :How to repack an Java Web Archive (WAR)?


I have a .war file of an application. It works, but I need to update some inner jars (only minor version changes)

While I can operate on .war archives using the midnight commander, the files can't be executed anymore: java.lang.SecurityException: SHA1 digest error.

I tried repacking it using the jar command, but I get it wrong: The archive contains new META-INF, and no WEB-INF (which is needed).

Thank you for proposed solutions!


The names should be META-INF and WEB-INF, without an "O".

Are you modifying the jar files in WEB-INF/libs? Because it sounds like you have tampered with a signed archive, and normally the war itself is unsigned.

If you alter a signed jar file, the signature is invalidated. Either re-sign the code with your code-signing key, or remove the invalidated signature information from the META-INF.

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