Java Unzip InputStream decompress(InputStream input, File destDir)

Description

decompress

License

Open Source License

Declaration

public static void decompress(InputStream input, File destDir) throws IOException 

Method Source Code

//package com.java2s;
/* (c) 2014 Open Source Geospatial Foundation - all rights reserved
 * (c) 2001 - 2013 OpenPlans//from  w ww.j  a  v a 2s.  c o  m
 * This code is licensed under the GPL 2.0 license, available at the root
 * application directory.
 */

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;

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

public class Main {
    public static void decompress(InputStream input, File destDir) throws IOException {
        ZipInputStream zin = new ZipInputStream(input);
        ZipEntry entry = null;

        byte[] buffer = new byte[1024];
        while ((entry = zin.getNextEntry()) != null) {
            File f = new File(destDir, entry.getName());
            if (entry.isDirectory()) {
                f.mkdirs();
                continue;
            }

            BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(f));

            int n = -1;
            while ((n = zin.read(buffer)) != -1) {
                out.write(buffer, 0, n);
            }

            out.flush();
            out.close();
        }
    }

    public static void decompress(final File inputFile, final File destDir) throws IOException {
        ZipFile zipFile = new ZipFile(inputFile);

        Enumeration<? extends ZipEntry> entries = zipFile.entries();

        while (entries.hasMoreElements()) {
            ZipEntry entry = (ZipEntry) entries.nextElement();
            InputStream stream = zipFile.getInputStream(entry);

            if (entry.isDirectory()) {
                // Assume directories are stored parents first then children.
                (new File(destDir, entry.getName())).mkdir();
                continue;
            }

            File newFile = new File(destDir, entry.getName());
            FileOutputStream fos = new FileOutputStream(newFile);
            try {
                byte[] buf = new byte[1024];
                int len;

                while ((len = stream.read(buf)) >= 0)
                    saveCompressedStream(buf, fos, len);

            } catch (IOException e) {
                zipFile.close();
                IOException ioe = new IOException("Not valid COAMPS archive file type.");
                ioe.initCause(e);
                throw ioe;
            } finally {
                fos.flush();
                fos.close();

                stream.close();
            }
        }
        zipFile.close();
    }

    /**
     * @param len 
     * @param stream
     * @param fos
     * @throws IOException
     */
    public static void saveCompressedStream(final byte[] buffer, final OutputStream out, final int len)
            throws IOException {
        try {
            out.write(buffer, 0, len);

        } catch (Exception e) {
            out.flush();
            out.close();
            IOException ioe = new IOException("Not valid archive file type.");
            ioe.initCause(e);
            throw ioe;
        }
    }
}

Related

1. decompress(ByteArrayInputStream xzStream)
2. decompress(final int type, final InputStream is, final OutputStream os)
3. decompress(InputStream inputStream)
4. decompress(InputStream is, OutputStream os)
5. decompressFile(InputStream is, OutputStream os)
6. decompressStream(InputStream input)