Problem Statement

I have a bunch of jar files lying in a folder. Lets name it /Users/labuser/jars

Each jar file has a manifest file in META_INF/MANIFEST.MF
I have to read each MANIFEST.MF file and get some information from it. So, instead of extracting whole jar, one by one is a tedius thing.

What I want

I want to extract that file in a folder whose name can be as of jar file.

Unzip command to extract a jar file

Following command can be used to unzip a complete jar file:

unzip <path of jar file>

If you want to unzip files to a particular folder

unzip <path of jar file> -d <path of target folder>

Note: if the target folder does not exists, it will be created

If you want to unzip only particular files

unzip <path of jar file> <path of file inside jar file>

If you want to unzip only particular files in a particular folder

unzip <path of jar file> <path of file inside jar file> -d <target folder>

Conclusion

That is all. Combine these, and you are done.

Shell script I used to solve this

for myfile in `ls /Users/labuser/jars` ; do unzip ../$myfile META-INF/MANIFEST.MF -d $myfile; done