Java Directory Copy nio copyDir(File dir1, File dir2)

Description

copy Dir

License

Open Source License

Declaration

public static void copyDir(File dir1, File dir2) throws IOException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2014 Gabriel Skantze.// ww  w.  j a v  a  2s  . c  o  m
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Gabriel Skantze - initial API and implementation
 ******************************************************************************/

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

import java.nio.channels.FileChannel;

import java.util.List;

public class Main {
    public static void copyDir(File dir1, File dir2) throws IOException {
        if (!dir1.isDirectory())
            throw new IOException("Not a directory: " + dir1);
        if (dir2.exists())
            throw new IOException("Cannot copy to existing directory: "
                    + dir2);
        dir2.mkdirs();
        File[] files = dir1.listFiles();
        if (files != null) {
            for (File f : files) {
                if (f.isDirectory()) {
                    copyDir(f, new File(dir2, f.getName()));
                } else {
                    copyFile(f, new File(dir2, f.getName()));
                }
            }
        }
    }

    public static void listFiles(String directoryName, List<String> files,
            String pattern) {
        File directory = new File(directoryName);

        // get all the files from a directory
        File[] fList = directory.listFiles();
        for (File file : fList) {
            if (file.isFile()) {
                if (file.getName().matches(pattern))
                    files.add(file.getAbsolutePath());
            } else if (file.isDirectory()) {
                listFiles(file.getAbsolutePath(), files, pattern);
            }
        }
    }

    public static void copyFile(File sourceFile, File destFile)
            throws IOException {
        if (!destFile.exists()) {
            destFile.createNewFile();
        }

        FileChannel source = null;
        FileChannel destination = null;

        try {
            source = new FileInputStream(sourceFile).getChannel();
            destination = new FileOutputStream(destFile).getChannel();
            destination.transferFrom(source, 0, source.size());
        } finally {
            if (source != null) {
                source.close();
            }
            if (destination != null) {
                destination.close();
            }
        }
    }
}

Related

1. copyDir(File sourceDir, File targetDir)
2. copyDir(final Path fromPath, final Path toPath)
3. copyDir(final String src, final String dest)
4. copyDir(Path from, Path to, IProgressMonitor monitor)