Java Unzip to Folder unzipToFolder(ZipInputStream zipInputStream, File dirToExtractTo)

Description

Unzips the given ZipInputStream to the given folder.

License

Open Source License

Parameter

Parameter	Description
zipInputStream	the zip input stream
dirToExtractTo	the dir to extract to

Exception

Parameter	Description
IOException	Signals that an I/O exception has occurred.

Declaration

public static final void unzipToFolder(ZipInputStream zipInputStream, File dirToExtractTo) throws IOException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2007 Red Hat, Inc./*from  w w  w.j ava  2  s .c o  m*/
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is made available under the terms of the
 * Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.eclipse.core.runtime.Assert;

public class Main {
    /** Signals the end of a stream. */
    private static final int EOS = -1;

    /**
     * Unzips the given ZipInputStream to the given folder.
     * 
     * @param zipInputStream
     *            the zip input stream
     * @param dirToExtractTo
     *            the dir to extract to
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     * 
     * @see ZipInputStream
     * @see File
     */
    public static final void unzipToFolder(ZipInputStream zipInputStream, File dirToExtractTo) throws IOException {
        Assert.isLegal(zipInputStream != null);
        Assert.isLegal(!dirToExtractTo.exists() || dirToExtractTo.isDirectory());
        try {
            for (ZipEntry zipEntry = null; (zipEntry = zipInputStream.getNextEntry()) != null;) {
                File file = new File(dirToExtractTo, zipEntry.getName());
                if (zipEntry.isDirectory()) {
                    if (!file.exists()) {
                        file.mkdirs();
                    }
                } else {
                    if (!file.getParentFile().exists()) {
                        file.getParentFile().mkdirs();
                    }
                    writeTo(zipInputStream, file);
                }
            }
        } finally {
            zipInputStream.close();
        }
    }

    private static void writeTo(InputStream inputStream, File file) throws IOException {
        BufferedOutputStream outputStream = new BufferedOutputStream(new FileOutputStream(file));
        byte[] buffer = new byte[8192];
        try {
            for (int read = 0; (read = inputStream.read(buffer)) != EOS;) {
                outputStream.write(buffer, 0, read);
            }
        } finally {
            outputStream.close();
        }
    }
}

Related

1. unzipFile(ZipFile zipFile, File destinationDir)
2. unzipToDirectory(File file, File dir)
3. unzipToFolder(final InputStream inputStream, final File outputFolder)
4. unzipToFolder(final InputStream inputStream, final File outputFolder)
5. unzipToFolder(String folderPath, InputStream source)
6. unzipZipFile(ZipFile zip, String directory)