Finding which JAR contains a class

I often want to search through a large number of JAR files looking for a particular class, and every time I do this I wish I had some utility to make it easier. So I finally made one:

#!/bin/sh

TARGET="$1"

for i in `find . -name "*jar"`
do
  jar tvf $i | grep $TARGET > /dev/null
  if [ $? == 0 ]
  then
    echo "$TARGET is in $i"
  fi
done

Update: My colleague Chris Johnson just posted a better version of this, with some caching over at the Fusion Security Blog.

About Mark Nelson

Mark Nelson is a Developer Evangelist at Oracle, focusing on microservices and AI. Mark has served as a Section Leader in Stanford's Code in Place program that has introduced tens of thousands of people to the joy of programming, he is a published author, a reviewer and contributor, a content creator and a lifelong learner. He enjoys traveling, meeting people and learning about foods and cultures of the world. Mark has worked at Oracle since 2006 and before that at IBM since 1994.

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