Java Unzip File unzip(File archive)

Description

Will decompress a ZIP archive to the current folder.

License

Open Source License

Declaration

public static void unzip(File archive) throws IOException 

Method Source Code

//package com.java2s;
/*/*ww w . ja v a 2 s .  c  o  m*/
   Copyright (c) 2011 Robin Vobruba <hoijui.quaero@gmail.com>
    
   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.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class Main {
    /**
     * Will decompress a ZIP archive to the current folder.
     * Code copied from
     * <a href="http://www.rgagnon.com/javadetails/java-0067.html">here</a>,
     * and slightly modified.
     */
    public static void unzip(File archive) throws IOException {
        unzip(archive, null);
    }

    private static void unzip(File archive, File singleOutputFile) throws IOException {
        InputStream fin = null;
        InputStream bin = null;
        ZipInputStream zin = null;
        try {
            fin = new FileInputStream(archive);
            bin = new BufferedInputStream(fin);
            zin = new ZipInputStream(bin);

            ZipEntry zEntry = zin.getNextEntry();
            do {
                File toFile = (singleOutputFile == null) ? new File(zEntry.getName()) : singleOutputFile;
                unzipSingleEntry(zin, toFile);
                zEntry = zin.getNextEntry();
            } while ((singleOutputFile == null) && (zEntry != null));
        } finally {
            if (zin != null) {
                zin.close();
            } else if (bin != null) {
                bin.close();
            } else if (fin != null) {
                fin.close();
            }
        }
    }

    /**
     * Will unzip next entry from given ZipInputStream
     */
    private static void unzipSingleEntry(ZipInputStream zin, File toFile) throws IOException {
        FileOutputStream out = null;
        try {
            out = new FileOutputStream(toFile);
            byte[] b = new byte[512];
            int len = 0;
            while ((len = zin.read(b)) != -1) {
                out.write(b, 0, len);
            }
        } finally {
            out.close();
        }
    }
}

Related

1. uncompressDirectory(File zipSource, File target)
2. uncompressEveryFileFromDirectory(File srcPath, File dstPath)
3. unCompressGzipFile(String path)
4. uncompressZipEntry(ZipInputStream zis, ZipEntry zipEntry, String dest)
5. unzip(File aFile)
6. unzip(File archive, File output)
7. unzip(File archiveFile, File destination)
8. unzip(File archiveFile, File destination)
9. unzip(File archiveFile, File targetDir, boolean skipRoot)