Zip a directory to a zip output stream - Java File Path IO

Java examples for File Path IO:Zip File

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Description

Zip a directory to a zip output stream

Demo Code

/**/*from w  w  w .j  av a  2  s. co  m*/
 * e-Science Central
 * Copyright (C) 2008-2013 School of Computing Science, Newcastle University
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation at:
 * http://www.gnu.org/licenses/gpl-2.0.html
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301, USA.
 */
//package com.java2s;
import java.io.*;
import java.util.zip.*;

public class Main {
    /** Zip a directory to a zip output stream */
    public static void zipDir(String baseDir, String dir2zip,
            ZipOutputStream zos) throws IOException {

        //create a new File object based on the directory we have to zip
        File zipDir = new File(dir2zip);
        //get a listing of the directory content
        String[] dirList = zipDir.list();
        byte[] readBuffer = new byte[2156];
        int bytesIn = 0;
        //loop through dirList, and zip the files
        for (int i = 0; i < dirList.length; i++) {
            File f = new File(zipDir, dirList[i]);
            if (f.isDirectory()) {
                //if the File object is a directory, call this
                //function again to add its content recursively
                String filePath = f.getPath();
                zipDir(baseDir, filePath, zos);
                //loop again
                continue;
            }
            //if we reached here, the File object f was not a directory
            //create a FileInputStream on top of f
            FileInputStream fis = new FileInputStream(f);
            // create a    new zipentry
            ZipEntry anEntry = new ZipEntry(subtractPath(baseDir,
                    f.getPath()).replace("\\", "/"));

            //place the zip entry in the ZipOutputStream object
            zos.putNextEntry(anEntry);
            //now write the content of the file to the ZipOutputStream
            while ((bytesIn = fis.read(readBuffer)) != -1) {
                zos.write(readBuffer, 0, bytesIn);
            }
            //close the Stream
            fis.close();
        }
    }

    public static String subtractPath(String base, String full) {
        return full.substring(base.length() + 1);
    }
}

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