boolean has = false;
        JarFile f = null;
        try {
            f = new JarFile(directory + path);
            JarEntry entry = f.getJarEntry(file);
            has = entry != null;
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        finally{
            if(f != null)
                try {
                    f.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

        }
        return has;