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  Invalid jar files after compression  (Read 2436 times)
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Offline caseyd

Senior Newbie





« Posted 2009-02-22 00:53:35 »

How do I compress a jar file with a manifest file and keep it executable? For example I was trying to use the following to create an executable jar:

1  
bjwflate -s 513 A.class META-INF\MANIFEST.MF


Whenever I try to run it it tells me the jar file is corrupt. This happens a lot after using certain optimizers as well. I also verified that I can create a jar file with the jar command and 7zip that runs ok.

Thanks,
Casey
Offline Hsaka
« Reply #1 - Posted 2009-02-22 06:30:12 »

With bjwflate, cd to the directory with your class file and meta-inf folder and type

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bjwflate -r gameName.zip *


Then rename gameName.zip to gameName.jar
Offline EnderGT

Junior Member





« Reply #2 - Posted 2009-02-25 01:06:03 »

How do I compress a jar file with a manifest file and keep it executable? For example I was trying to use the following to create an executable jar:

1  
bjwflate -s 513 A.class META-INF\MANIFEST.MF


Whenever I try to run it it tells me the jar file is corrupt. This happens a lot after using certain optimizers as well. I also verified that I can create a jar file with the jar command and 7zip that runs ok.

Thanks,
Casey

Basically, bjwflate flattens the contents of the file when you do it that way - in other words, the manifest is no longer under meta-inf, and thus the jar is invalid.

Doing it Hsaka's way should maintain the folder structure, and it should end up being valid.
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