static void unzip(File targetDir, File zipFile) {
        int BUFFER = 4096;
        try {
            FileInputStream fis = new FileInputStream(zipFile);
            ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
            ZipEntry entry;
            int count;
            byte data[] = new byte[BUFFER];
            while ((entry = zis.getNextEntry()) != null) {
                System.out.println("Extracting: " + entry);
                FileOutputStream fos = new FileOutputStream(new File(targetDir, entry.getName()));
                BufferedOutputStream dest = new BufferedOutputStream(fos, BUFFER);
                while ((count = zis.read(data, 0, BUFFER)) != -1) {
                    dest.write(data, 0, count);
                }
                dest.flush();
                dest.close();
            }
            zis.close();
        } catch (Exception e) {
            e.printStackTrace(System.err);
        }
    }