Java FileChannel Copy copyFileNio(File src, File dst)

Description

Use NIO to copy a file

License

Open Source License

Parameter

Parameter	Description
src	Source Path
dst	Destination Path

Exception

Parameter	Description
IOException	an exception

Declaration

public static final boolean copyFileNio(File src, File dst) throws IOException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2011 MadRobot.//from   ww w  .  ja v  a2 s  .c  o  m
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v2.1
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * 
 * Contributors:
 *  Elton Kent - 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;

public class Main {
    /**
     * Use NIO to copy a file
     * 
     * @param src
     *            Source Path
     * @param dst
     *            Destination Path
     * @return
     * @throws IOException
     * @see {@link FileUtils#recursiveCopy(File, File, boolean, boolean)}
     */
    public static final boolean copyFileNio(File src, File dst) throws IOException {
        FileChannel srcChannel = null, dstChannel = null;
        try {
            // Create channel on the source
            srcChannel = new FileInputStream(src).getChannel();

            // Create channel on the destination
            dstChannel = new FileOutputStream(dst).getChannel();

            // // Copy file contents from source to destination
            // dstChannel.transferFrom(srcChannel, 0, srcChannel.size());

            {
                // long theoretical_max = (64 * 1024 * 1024) - (32 * 1024);
                int safe_max = (64 * 1024 * 1024) / 4;
                long size = srcChannel.size();
                long position = 0;
                while (position < size) {
                    position += srcChannel.transferTo(position, safe_max, dstChannel);
                }
            }

            // Close the channels
            srcChannel.close();
            srcChannel = null;
            dstChannel.close();
            dstChannel = null;

            return true;
        } finally {
            try {
                if (srcChannel != null) {
                    srcChannel.close();
                }
            } catch (IOException e) {

            }
            try {
                if (dstChannel != null) {
                    dstChannel.close();
                }
            } catch (IOException e) {

            }
        }
    }
}

Related

1. copyFileByChannel(String srcFileName, String dstFileName)
2. copyFileContent(final String sourcePath, final String targetPath)
3. copyFileIntoProjectFolder(String projectName, File file)
4. copyFileLocking(File copyFrom, File copyTo)
5. copyFileNIO(File src, File dest)
6. copyFileOrDirectory(File source, File destination, boolean flag)
7. copyFiles(File originalFile, File destinationFile)
8. copyFiles(File source, File dest)
9. copyFiles(File srcFile, File dstFile, boolean overwrite)