Java Unzip to Folder unzipToFolder(final InputStream inputStream, final File outputFolder)

Description

unzip To Folder

License

Open Source License

Declaration

private static void unzipToFolder(final InputStream inputStream, final File outputFolder) throws IOException 

Method Source Code

//package com.java2s;
/**/*from  ww  w  .ja v  a 2s.  co m*/
 * Copyright (C) 2016 Bonitasoft S.A.
 * Bonitasoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation
 * version 2.1 of the License.
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301, USA.
 **/

import java.io.File;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

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

public class Main {
    private static void unzipToFolder(final InputStream inputStream, final File outputFolder) throws IOException {
        try (ZipInputStream zipInputstream = new ZipInputStream(inputStream)) {
            extractZipEntries(zipInputstream, outputFolder);
        }
    }

    private static void extractZipEntries(final ZipInputStream zipInputstream, final File outputFolder)
            throws IOException {
        ZipEntry zipEntry;
        while ((zipEntry = zipInputstream.getNextEntry()) != null) {
            try {
                // For each entry, a file is created in the output directory "folder"
                final File outputFile = new File(outputFolder.getAbsolutePath(), zipEntry.getName());
                // If the entry is a directory, it creates in the output folder, and we go to the next entry (continue).
                if (zipEntry.isDirectory()) {
                    outputFile.mkdirs();
                    continue;
                }
                writeZipInputToFile(zipInputstream, outputFile);
            } finally {
                zipInputstream.closeEntry();
            }
        }
    }

    private static void writeZipInputToFile(final ZipInputStream zipInputstream, final File outputFile)
            throws FileNotFoundException, IOException {
        // The input is a file. An FileOutputStream is created to write the content of the new file.
        outputFile.getParentFile().mkdirs();
        try (FileOutputStream fileOutputStream = new FileOutputStream(outputFile)) {
            // The contents of the new file, that is read from the ZipInputStream using a buffer (byte []), is written.
            int bytesRead;
            final byte[] buffer = new byte[1024];
            while ((bytesRead = zipInputstream.read(buffer)) > -1) {
                fileOutputStream.write(buffer, 0, bytesRead);
            }
            fileOutputStream.flush();
        } catch (final IOException ioe) {
            // In case of error, the file is deleted
            outputFile.delete();
            throw ioe;
        }
    }
}

Related

1. unzipFile(String zipFilePath, String releasePath)
2. unzipFile(String zipFilePath, String targetPath)
3. unzipFile(ZipFile zipFile, File destinationDir)
4. unzipToDirectory(File file, File dir)
5. unzipToFolder(final InputStream inputStream, final File outputFolder)
6. unzipToFolder(String folderPath, InputStream source)
7. unzipToFolder(ZipInputStream zipInputStream, File dirToExtractTo)
8. unzipZipFile(ZipFile zip, String directory)