code: private void unzip(final File file, final String outputDir) throws IOException {
  
  		try (final ZipFile zipFile = new ZipFile(file)) {
  
  			final Enumeration<? extends ZipEntry> entries = zipFile.entries();
  
  			while (entries.hasMoreElements()) {
  
  				final ZipEntry entry = entries.nextElement();
  				final File targetFile = new File(outputDir, entry.getName());
  
  				if (entry.isDirectory()) {
  
  					targetFile.mkdirs();
  
  				} else {
  
  					targetFile.getParentFile().mkdirs();
  					InputStream in = zipFile.getInputStream(entry);
  
  					try (OutputStream out = new FileOutputStream(targetFile)) {
  
  						IOUtils.copy(in, out);
  						IOUtils.closeQuietly(in);
  					}
  				}
  			}
  		}
  	}
docs: Unzip given file to given output directory.
  
  @param file
  @param outputDir
  @throws IOException