Java FileChannel Copy copyFile(File source, File destination, long chunkSize, boolean overwrite)

Description

copy File

License

Apache License

Declaration

public static boolean copyFile(File source, File destination, long chunkSize, boolean overwrite)
            throws IOException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2009 Licensed under the Apache License, 
 * Version 2.0 (the "License"); you may not use this file except in compliance 
 * with the License. You may obtain a copy of the License at 
 * /*  w  w w.  ja v  a  2 s. co m*/
 * http://www.apache.org/licenses/LICENSE-2.0 
 * 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * Contributors:
 * 
 * Astrient Foundation Inc. 
 * www.astrientfoundation.org
 * rashid@astrientfoundation.org
 * Rashid Mayes 2009
 *******************************************************************************/

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;

public class Main {
    public static boolean copyFile(File source, File destination, long chunkSize, boolean overwrite)
            throws IOException {
        if (destination.exists() && !overwrite) {
            return false;
        } else if (destination.exists() && !destination.canWrite()) {
            return false;
        } else {
            FileChannel sourceChannel = null;
            FileChannel destinationChannel = null;
            FileInputStream fis = null;
            FileOutputStream fos = null;
            try {
                fis = new FileInputStream(source);
                fos = new FileOutputStream(destination);

                sourceChannel = fis.getChannel();
                destinationChannel = fos.getChannel();

                if (chunkSize == 0) {
                    chunkSize = sourceChannel.size();
                }

                long transferred = 0;
                long stop = sourceChannel.size();

                for (long maxReps = ((stop / chunkSize) + 1) * 2, reps = 0; (reps < maxReps)
                        && (transferred < stop); reps++) {
                    transferred += sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);
                }

                return (transferred >= stop);
            } catch (IOException e) {
                throw e;
            } finally {
                try {
                    if (sourceChannel != null)
                        sourceChannel.close();
                } catch (Exception e) {
                }
                try {
                    if (destinationChannel != null)
                        destinationChannel.close();
                } catch (Exception e) {
                }
                try {
                    if (fis != null)
                        fis.close();
                } catch (Exception e) {
                }
                try {
                    if (fos != null)
                        fos.close();
                } catch (Exception e) {
                }

            }
        }
    }
}

Related

1. copyFile(File source, File destination)
2. copyFile(File source, File destination)
3. copyFile(File source, File destination)
4. copyFile(File source, File destination)
5. copyFile(File source, File destination, boolean overwrite)
6. copyFile(File source, File target)
7. copyFile(File source, File target)
8. copyFile(File source, File target)
9. copyFile(File source, File target)