Java Unzip to Folder unzip(String sourceFile, String destDir)

Description

unzip

License

Apache License

Declaration

public static void unzip(String sourceFile, String destDir) throws IOException 

Method Source Code

//package com.java2s;
/*/*w w w.  j a  va2s  . co m*/
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

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.HashSet;

import java.util.Set;

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

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

    public static void unzip(String sourceFile, String destDir) throws IOException {
        final FileInputStream fis = new FileInputStream(sourceFile);
        final ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
        final File destDirFile = new File(destDir);
        final byte[] data = new byte[BUFFER_SIZE];

        ZipEntry entry;
        Set<String> visitedDirs = new HashSet<>();
        createDir(destDir);
        while ((entry = zis.getNextEntry()) != null) {
            createDir(destDirFile, entry, visitedDirs);
            if (entry.isDirectory()) {
                continue;
            }
            int count;

            // write the file to the disk
            File dst = new File(destDir, entry.getName());
            FileOutputStream fos = new FileOutputStream(dst);
            BufferedOutputStream dest = new BufferedOutputStream(fos, BUFFER_SIZE);
            while ((count = zis.read(data, 0, BUFFER_SIZE)) != -1) {
                dest.write(data, 0, count);
            }
            // close the output streams
            dest.flush();
            dest.close();
        }

        zis.close();
    }

    private static void createDir(File destDirectory, ZipEntry entry, Set<String> visitedDirs) {
        String name = entry.getName();
        int index = name.lastIndexOf(File.separator);
        if (index != -1) {
            String dirSequence = name.substring(0, index);
            if (visitedDirs.add(dirSequence)) {
                File newDirs = new File(destDirectory, dirSequence);
                newDirs.mkdirs();
            }
        }
    }

    private static void createDir(String destDirectory) {
        File newDirs = new File(destDirectory + File.separator);
        newDirs.mkdirs();
    }
}

Related

1. unzip(String inFilePath, String outFilePath)
2. unzip(String inputZipPath, String destinationDirectory)
3. unzip(String path, int buffer)
4. unZip(String pathDest, BufferedInputStream buffInputStream)
5. unzip(String sourceFile, String destDir)
6. unzip(String sourceFile, String toDir)
7. unzip(String sourceFileName, String destPath)
8. unzip(String sourceZip, String targetDirectory)
9. unzip(String src, String dest, PrintStream stream)