Java Directory Copy nio copyDirectory(File source, File destination, boolean recursive)

Description

Copies a source directory to a destination directory.

License

Open Source License

Parameter

Parameter	Description
source	Source directory
destination	Destination directory
recursive	boolean flag, if true will recursively copy sub-directories

Declaration

private static void copyDirectory(File source, File destination, boolean recursive)
        throws FileNotFoundException, IOException 

Method Source Code

//package com.java2s;
/* Copyright (C) 2000-2003 The Software Conservancy as Trustee.
 * All rights reserved.//from   ww  w .java2s .  c om
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Nothing in this notice shall be deemed to grant any rights to trademarks,
 * copyrights, patents, trade secrets or any other intellectual property of the
 * licensor or any contributor except as expressly stated herein. No patent
 * license is granted separate from the Software, for code that you delete from
 * the Software, or for combinations of the Software with other software or
 * hardware.
 */

import java.io.*;

import java.nio.channels.FileChannel;

public class Main {
    /**
     * Copies a source directory to a destination directory.
     *
     * @param source Source directory
     * @param destination Destination directory
     * @param recursive boolean flag, if true will recursively copy sub-directories
     *
     * @exception IOException
     */
    private static void copyDirectory(File source, File destination, boolean recursive)
            throws FileNotFoundException, IOException {
        if (!source.exists())
            throw new FileNotFoundException("Source not found: " + source);
        if (!source.canRead())
            throw new IOException("Source is unreadable: " + source);
        if (!source.isDirectory())
            throw new IOException("Source is not a directory: " + source);
        if (destination.exists() && !destination.canWrite())
            throw new IOException("Destination is unwritable: " + destination);
        if (destination.isFile())
            throw new IOException(
                    "Cannot copy directory " + source.toString() + " to file " + destination.toString());

        if (!destination.exists()) {
            System.out.println("Creating directory: " + destination);
            destination.mkdirs();
        }

        String targetName;
        File targetSource;
        File targetDestination;

        String[] files = source.list();

        for (int i = 0; i < files.length; i++) {
            targetName = files[i];
            targetSource = new File(source.toString() + File.separator + targetName);
            targetDestination = new File(destination.toString() + File.separator + targetName);

            if (targetSource.isFile()) {
                copy(targetSource, targetDestination, recursive);
            } else if (targetSource.isDirectory() && recursive) {
                copy(targetSource, targetDestination, recursive);
            }
        }
    }

    /**
     * Copies a source file to a destination file or directory OR
     * Copies a source directory to a destination directory.
     *
     * @param source Source file name or directory name
     * @param destination Destination file name or directory name
     * @param recursive boolean flag, if true will recursively copy sub-directories
     *
     * @exception IOException
     */
    public static void copy(String source, String destination, boolean recursive)
            throws FileNotFoundException, IOException {
        File sourceFile = new File(source);
        File destinationFile = new File(destination);
        copy(sourceFile, destinationFile, recursive);
    }

    /**
     * Copies a source file to a destination file or directory OR
     * Copies a source directory to a destination directory.
     *
     * @param source Source file or directory
     * @param destination Destination file or directory
     * @param recursive boolean flag, if true will recursively copy sub-directories
     *
     * @exception IOException
     */
    public static void copy(File source, File destination, boolean recursive)
            throws FileNotFoundException, IOException {
        if (source.isFile()) {
            copyFile(source, destination);
        } else if (source.isDirectory()) {
            copyDirectory(source, destination, recursive);
        }
    }

    public static void copyFile(String source, String destination) throws IOException {
        copyFile(new File(source), new File(destination));
    }

    public static void copyFile(File source, File destination) throws IOException {
        if (!source.exists())
            throw new FileNotFoundException("Source not found: " + source);
        if (!source.canRead())
            throw new IOException("Source is unreadable: " + source);
        if (!source.isFile())
            throw new IOException("Source is not a file: " + source);
        if (destination.exists() && !destination.canWrite())
            throw new IOException("Destination is unwritable: " + destination);

        if (destination.getParentFile() != null && !destination.getParentFile().exists()) {
            System.out.println("Creating directory: " + destination.getParentFile());
            destination.getParentFile().mkdirs();
        }

        if (destination.isDirectory()) {
            destination = new File(destination.toString() + File.separator + source.toString());
        }

        System.out.println("Copying " + source + " to " + destination);
        copyFile(new FileInputStream(source), new FileOutputStream(destination));
    }

    public static void copyFile(FileInputStream in, FileOutputStream out) throws IOException {
        FileChannel srcChannel = in.getChannel();
        FileChannel destChannel = out.getChannel();
        try {
            srcChannel.transferTo(0, srcChannel.size(), destChannel);
        } finally {
            if (srcChannel != null)
                srcChannel.close();
            if (destChannel != null)
                destChannel.close();
        }
    }
}

Related

1. copyDirectory(File in, File out)
2. copyDirectory(File source, File dest, CopyOption... options)
3. copyDirectory(File source, File destination)
4. copyDirectory(File source, File destination)
5. copyDirectory(File source, File destination)
6. copyDirectory(File source, File target, boolean acceptFileInUseError)
7. copyDirectory(File sourceDir, File destinationDir)
8. copyDirectory(File sourceDir, File targetDir)
9. copyDirectory(File sourceDirectory, File targetDirectory)