Java tutorial
/* * Copyright 2012,2013 Robert Huitema robert@42.co.nz * * This file is part of FreeBoard. (http://www.42.co.nz/freeboard) * * FreeBoard is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * FreeBoard is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with FreeBoard. If not, see <http://www.gnu.org/licenses/>. */ /** based on http://www.java-examples.com/create-zip-file-directory-recursively-using-zipoutputstream-example */ package nz.co.fortytwo.freeboard.installer; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.util.Enumeration; import java.util.zip.ZipEntry; import java.util.zip.ZipException; import java.util.zip.ZipFile; import java.util.zip.ZipOutputStream; import org.apache.commons.io.IOUtils; import org.apache.log4j.Logger; public class ZipUtils { private static Logger logger = Logger.getLogger(ZipUtils.class); public static void zip(File sourceDir, File zipFile) { try { // create object of FileOutputStream FileOutputStream fout = new FileOutputStream(zipFile); // create object of ZipOutputStream from FileOutputStream ZipOutputStream zout = new ZipOutputStream(fout); addDirectory(zout, sourceDir, sourceDir); // close the ZipOutputStream zout.close(); logger.info("Zip file has been created!"); } catch (Exception e) { logger.error(e.getMessage(), e); } } /** * Add the directory recursively into a zip file * @param zout * @param fileSource * @param sourceDir */ private static void addDirectory(ZipOutputStream zout, File fileSource, File sourceDir) { // get sub-folder/files list File[] files = fileSource.listFiles(); logger.debug("Adding directory " + fileSource.getName()); for (int i = 0; i < files.length; i++) { try { String name = files[i].getAbsolutePath(); name = name.substring((int) sourceDir.getAbsolutePath().length() + 1); // if the file is directory, call the function recursively if (files[i].isDirectory()) { addDirectory(zout, files[i], sourceDir); continue; } /* * we are here means, its file and not directory, so * add it to the zip file */ logger.debug("Adding file " + files[i].getName()); // create object of FileInputStream FileInputStream fin = new FileInputStream(files[i]); zout.putNextEntry(new ZipEntry(name)); IOUtils.copy(fin, zout); zout.closeEntry(); // close the InputStream fin.close(); } catch (IOException ioe) { logger.error(ioe.getMessage(), ioe); } } } /** * Unzip a zipFile into a directory * @param targetDir * @param zipFile * @throws ZipException * @throws IOException */ public static void unzip(File targetDir, File zipFile) throws ZipException, IOException { ZipFile zip = new ZipFile(zipFile); @SuppressWarnings("unchecked") Enumeration<ZipEntry> z = (Enumeration<ZipEntry>) zip.entries(); while (z.hasMoreElements()) { ZipEntry entry = z.nextElement(); File f = new File(targetDir, entry.getName()); if (f.isDirectory()) { if (!f.exists()) { f.mkdirs(); } } else { f.getParentFile().mkdirs(); InputStream in = zip.getInputStream(entry); BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(f)); IOUtils.copy(in, out); in.close(); out.flush(); out.close(); } } zip.close(); } }