Here you can find the source of unzip(File fileToUnzip, File destinationDirectory)
public static void unzip(File fileToUnzip, File destinationDirectory) throws IOException
//package com.java2s; /******************************************************************************* * Copyright (c) JavaPEG developers//www . j a v a 2s. c om * * This program 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 2 of the License, or * (at your option) any later version. * * This program 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 this program. If not, see <http://www.gnu.org/licenses/>. ******************************************************************************/ import java.io.*; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; public class Main { public static void unzip(File fileToUnzip, File destinationDirectory) throws IOException { //create output directory is not exists if (!destinationDirectory.exists()) { destinationDirectory.mkdirs(); } else { if (destinationDirectory.isFile()) { destinationDirectory = destinationDirectory.getParentFile(); } } try (ZipInputStream zis = new ZipInputStream(new FileInputStream(fileToUnzip))) { //get the zipped file list entry ZipEntry ze = zis.getNextEntry(); while (ze != null) { File newFile = new File(destinationDirectory, ze.getName()); //create all non exists folders //else you will hit FileNotFoundException for compressed folder newFile.getParentFile().mkdirs(); try (BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(newFile))) { byte[] buffer = new byte[2048]; int len; while ((len = zis.read(buffer)) > 0) { bos.write(buffer, 0, len); } } zis.closeEntry(); ze = zis.getNextEntry(); } } } }