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

Description

copy Directory

License

Open Source License

Declaration

public static void copyDirectory(File source, File destination) throws IOException 

Method Source Code

//package com.java2s;
/*//from  w w  w.  ja  v a 2 s .  c  om
 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import java.nio.channels.FileChannel;

public class Main {
    public static void copyDirectory(File source, File destination) throws IOException {
        if (!source.exists()) {
            throw new IllegalArgumentException("Source directory (" + source.getPath() + ") doesn't exist.");
        }

        if (!source.isDirectory()) {
            throw new IllegalArgumentException("Source (" + source.getPath() + ") must be a directory.");
        }

        destination.mkdirs();

        File[] files = source.listFiles();

        for (File file : files) {
            if (file.isDirectory()) {
                copyDirectory(file, new File(destination, file.getName()));
            } else {
                copyFile(file, new File(destination, file.getName()));
            }
        }
    }

    public static void copyFile(File from, File to) throws FileNotFoundException, IOException {

        FileChannel infc = null;
        FileChannel outfc = null;
        try {
            infc = new FileInputStream(from).getChannel();
            outfc = new FileOutputStream(to).getChannel();
            long transfered = infc.transferTo(0, from.length(), outfc);
            while (transfered < from.length()) {
                transfered = infc.transferTo(transfered, from.length(), outfc);
            }
        } finally {
            try {
                if (infc != null) {
                    infc.close();
                }
            } catch (Exception ignore) {
            }
            try {
                if (outfc != null) {
                    outfc.close();
                }
            } catch (Exception ignore) {
            }
        }
        to.setExecutable(from.canExecute());
        to.setReadable(from.canRead());
        to.setWritable(from.canWrite());
    }
}

Related

1. copyDir(String src, String dst)
2. copyDirectiory(String sourceDir, String targetDir)
3. copyDirectory(File in, File out)
4. copyDirectory(File in, File out)
5. copyDirectory(File source, File dest, CopyOption... options)
6. copyDirectory(File source, File destination)
7. copyDirectory(File source, File destination)
8. copyDirectory(File source, File destination, boolean recursive)
9. copyDirectory(File source, File target, boolean acceptFileInUseError)