List contents of multiple jar files
I am searching for a .class file inside a bunch of jars.
jar tf abc.jar
works for one file. I tried
find -name "*.jar" | xargs jar tf
prints nothing. The only solution I can think of, is unzip all, then search. Is there a better way? I'm on LUnix.
Edit: When scanning many jars, it is useful to print the jar file name along with the class. This method works well:
find . | grep jar$ | while read fname; do jar tf $fname | grep SchemaBuilder && echo $fname; done
Sample output produced:
1572 Wed Jul 25 10:20:18 EDT 2007 org/apache/ws/commons/schema/SchemaBuilder$1.class
1718 Wed Jul 25 10:20:18 EDT 2007 org/apache/ws/commons/schema/SchemaBuilder$2.class
42607 Wed Jul 25 10:20:18 EDT 2007 org/apache/ws/commons/schema/SchemaBuilder.class
./XmlSchema-1.3.2.jar
1572 Wed Jul 25 10:20:18 EDT 2007 org/apache/ws/commons/schema/SchemaBuilder$1.class
1718 Wed Jul 25 10:20:18 EDT 2007 org/apache/ws/commons/schema/S开发者_StackOverflowchemaBuilder$2.class
42607 Wed Jul 25 10:20:18 EDT 2007 org/apache/ws/commons/schema/SchemaBuilder.class
./XmlSchema.jar
You need to pass -n 1
to xargs
to force it to run a separate jar
command for each filename that it gets from find
:
find -name "*.jar" | xargs -n 1 jar tf
Otherwise xargs
's command line looks like jar tf file1.jar file2.jar...
, which has a different meaning to what is intended.
A useful debugging technique is to stick echo
before the command to be run by xargs
:
find -name "*.jar" | xargs echo jar tf
This would print out the full jar
command instead of executing it, so that you can see what's wrong with it.
I faced a similar situation where I need to search for a class in a list of jar files present in a directory. Also I wanted to know from which jar file the class belongs to. I used this below code snippet(shell script) and found out to be helpful. Below script will list down the jar files that contains the class to be searched.
#!/bin/sh
LOOK_FOR="codehaus/xfire/spring"
for i in `find . -name "*jar"`
do
echo "Looking in $i ..."
jar tvf $i | grep $LOOK_FOR > /dev/null
if [ $? == 0 ]
then
echo "==> Found \"$LOOK_FOR\" in $i"
fi
done
Shell script taken from : http://alvinalexander.com/blog/post/java/shell-script-search-search-multiple-jar-files-class-pattern
You can also use -exec
option of find
find . -name "*.jar" -exec jar tf {} \;
Here's what I use in Cygwin. It supports section headers per jar file as requested above.
find . -name "*.jar" \
-exec echo ======\ {}\ ====== \; \
-exec /c/Program\ Files/Java/jdk1.7.0_45/bin/jar.exe tf {} \; | less
For *nix, drop the ".exe":
find . -name "*.jar" \
-exec echo ======\ {}\ ====== \; \
-exec jar tf {} \; | less
You can also use unzip which is more faster than jar (-l option to print zip content).
For instance, a small script that does roughly what you want:
#!/bin/bash
for i in $(find . -name "*.jar")
do
if [ -f $i ]
then
echo $i
unzip -l $i | grep $*
fi
done
I don't see the necessity for using exec, this worked for me in Cygwin on Windows:
find . -name "*.jar" | while read jarfile; do unzip -l $jarfile | fgrep "foo" ; done
Find jar files and get all classes and members saved on a txt.
(for j in $(find -name '*.jar');do echo "--$j --";jar tf $j | grep .class | sed 's#/#.#g' | sed 's/.class/ /g' | xargs -n 1 javap -classpath $j ; done;) >> classes.txt
If you coming to this question and you need to extract all jar files in a windows environment, navigate to the directory where you have saved all the jar files and save a batch file with the following content:
for /r %%f in (*) do jar -xvf %%f
By running the batch file, it will extract each jar file in the directory. The only thing here is that it will extract in the same directory where the jar file is.
If you are using Eclipse, you can create a project and add all jars. You will then be able to find a class in any of the jars.
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