Find classes in jars

findclass.py

#!/usr/bin/env python

import sys, os
from zipfile import ZipFile

# Given a directory of jar files and a pattern, list all files that
# contain matching classes, and the matching classes
#
# Usage: findclass.py <dir> <pattern>

dir, pattern = sys.argv[1:3]

for filename in os.listdir(dir):
    if filename.endswith(".jar"):
        matches = [path for path in ZipFile(filename, "r").namelist()
                   if pattern in path]
        if matches:
            print "%s:" % filename
            for m in matches:
                print "\t%s" % m