Java Unzip File unzip(final File zip, final File dir)

Description

unzip

License

Open Source License

Declaration

public static void unzip(final File zip, final File dir) throws Exception 

Method Source Code

//package com.java2s;
/*//from w w w  .  ja  va 2 s . c o m
 * Copyright (c) 2012 Diamond Light Source Ltd.
 *
 * All rights reserved. This program and the accompanying materials
 * are 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
 */

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class Main {
    private static final int BUFFER = 4096;

    public static void unzip(final File zip, final File dir) throws Exception {

        if (!zip.exists())
            throw new FileNotFoundException("Cannot find " + zip);
        if (!dir.exists())
            throw new FileNotFoundException("Cannot find " + dir);
        if (!zip.isFile())
            throw new FileNotFoundException("Zip file must be a file " + zip);
        if (!dir.isDirectory())
            throw new FileNotFoundException("Dir argument must be a directory " + dir);

        final ZipInputStream zis = new ZipInputStream(new BufferedInputStream(new FileInputStream(zip)));

        try {

            ZipEntry entry;

            while ((entry = zis.getNextEntry()) != null) {

                int count;
                byte data[] = new byte[BUFFER];

                final String path = dir.getAbsolutePath() + "/" + entry.getName();
                final File out = new File(path);
                if (entry.isDirectory()) {
                    out.mkdirs();
                    continue;
                } else {
                    out.getParentFile().mkdirs();
                    out.createNewFile();
                }
                final FileOutputStream fos = new FileOutputStream(out);
                final BufferedOutputStream dest = new BufferedOutputStream(fos, BUFFER);
                try {
                    while ((count = zis.read(data, 0, BUFFER)) != -1) {
                        dest.write(data, 0, count);
                    }
                    dest.flush();
                } finally {
                    dest.close();
                }
            }

        } finally {
            zis.close();
        }

    }
}

Related

1. unzip(File zippedFile)
2. unzip(File zippedFile, File outputDirectory)
3. unzip(File zippedFile, File targetDir)
4. unzip(final byte[] zippedContent)
5. unzip(final File dir, final ZipInputStream from)
6. unzip(final File zipFile, final File destDir)
7. unzip(final File zipFile, final String targetDir)
8. unzip(final InputStream is, final File outputDirectory)
9. unzip(final InputStream zipFile, final File targetFolder)