Java Unzip File unzip(File file, File toDir)

Description

unzip

License

Open Source License

Declaration

public static void unzip(File file, File toDir) throws Throwable 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

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

import java.util.Collection;
import java.util.Enumeration;

public class Main {
    public static final int BUFFER_SIZE = 2048;

    public static void unzip(File file, File toDir) throws Throwable {

        unzip(file, toDir, null);// www .  j  a  v  a2s  . c om

    }

    public static void unzip(File file, File toDir, Collection<File> files) throws Throwable {

        unzip(file, toDir, files, false);

    }

    /**
     * Extract zip file to the specified directory also save the extracted files
     * into the specified Collection. (Using java.util.zip). The order of
     * unzipping does preserve the order in which files were packed in to the
     * zip archive.
     * 
     * @param file
     *            the zip file to extract.
     * @param toDir
     *            the destination directory.
     * @param files
     *            the collection of the extracted files. Set to null if no
     *            references to the extracted files need to be kept.
     * @param stream
     *            set to true to use ZipInputStream instead of ZipFile. See <a
     *            href=
     *            "http://java.sun.com/developer/technicalArticles/Programming/compression/"
     *            >Detail</a>
     * @throws Throwable
     */
    public static void unzip(File file, File toDir, Collection<File> files, boolean stream) throws Throwable {

        byte[] buffer = new byte[BUFFER_SIZE];
        if (stream) {
            java.util.zip.ZipInputStream zis = new java.util.zip.ZipInputStream(
                    new BufferedInputStream(new FileInputStream(file)));
            java.util.zip.ZipEntry entry;
            while ((entry = zis.getNextEntry()) != null) {
                File destFile = new File(toDir.getAbsolutePath() + "/" + entry.getName());
                if (entry.isDirectory()) {
                    destFile.mkdirs();
                } else {
                    File parentDir = destFile.getParentFile();
                    if (!parentDir.exists()) {
                        parentDir.mkdirs();
                    }
                    BufferedOutputStream os = new BufferedOutputStream(new FileOutputStream(destFile), BUFFER_SIZE);
                    try {
                        int count;
                        while ((count = zis.read(buffer, 0, BUFFER_SIZE)) != -1) {
                            os.write(buffer, 0, count);
                        }
                        os.flush();
                    } finally {
                        os.close();
                    }
                }
                if (files != null) {
                    files.add(destFile);
                }
            }
            zis.close();
        } else {
            java.util.zip.ZipFile zipFile = new java.util.zip.ZipFile(file);
            Enumeration<?> entries = zipFile.entries();
            while (entries.hasMoreElements()) {
                java.util.zip.ZipEntry entry = (java.util.zip.ZipEntry) entries.nextElement();
                File destFile = new File(toDir.getAbsolutePath() + "/" + entry.getName());
                if (entry.isDirectory()) {
                    destFile.mkdirs();
                } else {
                    File parentDir = destFile.getParentFile();
                    if (!parentDir.exists()) {
                        parentDir.mkdirs();
                    }
                    BufferedInputStream is = new BufferedInputStream(zipFile.getInputStream(entry), BUFFER_SIZE);
                    BufferedOutputStream os = new BufferedOutputStream(new FileOutputStream(destFile), BUFFER_SIZE);
                    try {
                        int count;
                        while ((count = is.read(buffer, 0, BUFFER_SIZE)) != -1) {
                            os.write(buffer, 0, count);
                        }
                        os.flush();
                    } finally {
                        os.close();
                        is.close();
                    }
                }
                if (files != null) {
                    files.add(destFile);
                }
            }
        }

    }
}

Related

1. unzip(File file, File dest)
2. unzip(File file, File destDir)
3. unzip(File file, File directory)
4. unzip(File file, File targetDirectory)
5. unzip(File file, File targetDirectory)
6. unzip(File file, File toDirectory)
7. unzip(File file, String destination, String container)
8. unZip(File file, String outPath, String zipFileName)
9. unzip(File file, String targetDirectory)