Java Unzip File unzip(File zip)

Description

unzip a file

License

Open Source License

Parameter

Parameter	Description
zip	a parameter

Declaration

public static void unzip(File zip) 

Method Source Code

//package com.java2s;
/*/*ww w .j ava  2s  .co m*/
 * Copyright (c) 2009 The Regents of the University of California.
 * All rights reserved.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the above
 * copyright notice and the following two paragraphs appear in all copies
 * of this software.
 *
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
 * FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
 * THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
 * PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
 * CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
 * ENHANCEMENTS, OR MODIFICATIONS.
 *
 */

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class Main {
    /**
     * unzip a file
     *
     * @param zip
     */
    public static void unzip(File zip) {
        try {
            String destinationDirName = zip.getName().substring(0,
                    zip.getName().length() - ".zip".length());
            File destinationDir = new File(zip.getParentFile(),
                    destinationDirName);
            unzipHelper(zip, destinationDir);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * unzip a file to a dir
     *
     * @param zip
     * @param destinationDir
     */
    public static void unzip(File zip, File destinationDir) {
        try {
            unzipHelper(zip, destinationDir);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * unzip a file to a dir
     *
     * @param zip
     * @param destinationDir
     * @throws IOException
     */
    private static void unzipHelper(File zip, File destinationDir)
            throws IOException {
        System.out.println("Unzipping " + zip.getAbsolutePath());

        destinationDir.mkdirs();
        ZipInputStream zis = new ZipInputStream(new BufferedInputStream(
                new FileInputStream(zip)));
        ZipEntry entry;
        while ((entry = zis.getNextEntry()) != null) {
            File outputFile = new File(destinationDir, entry.getName());
            if (entry.isDirectory()) {
                outputFile.mkdirs();
                continue;
            }
            int count = 0;
            final int BUFFER = 2048;
            byte[] data = new byte[2048];
            FileOutputStream fos = new FileOutputStream(outputFile);
            BufferedOutputStream destinationStream = new BufferedOutputStream(
                    fos, BUFFER);
            while ((count = zis.read(data, 0, BUFFER)) != -1) {
                destinationStream.write(data, 0, count);
            }
            destinationStream.flush();
            destinationStream.close();
        }
        zis.close();
        System.out.println("Done unzipping");
    }
}

Related

1. unzip(File src, File target)
2. unzip(File srcZipFile, File tgtDir)
3. unzip(File tarFile, File destinationDir)
4. unzip(File target)
5. unzip(File targetZip, File dirToExtract)
6. unZip(File zip, File dest)
7. unzip(File zip, File destination)
8. unzip(File zip, File dir)
9. unzip(File zip, File directory)