public static void unzipFiles(String dir, String outputDir)
			throws IOException {
		File directory = new File(dir);
		File[] files = directory.listFiles();
		for (File f : files) {
			if (f.isFile()) {
				// getLogger().info("file name : " + f.getAbsolutePath());
				unzipFile(f.getAbsolutePath(), outputDir);
			} else if (f.isDirectory()) {
				recur(f, outputDir);
			}
		}
	}