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

Description

Copies a file.

License

Open Source License

Parameter

Parameter	Description
source	The source file.
destination	The destination file.
overwrite	<i>true</i> to delete the file if it already exists.

Exception

Parameter	Description
IOException	Thrown if there is a problem copying or if the file already exists and<b>overwrite</b> is <i>false</i>.

Declaration

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

Method Source Code

//package com.java2s;
/*// w  w w  .  ja v a2s . c om
 * Copyright 2015 The OpenDCT Authors. All Rights Reserved
 *
 * 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
 *
 *     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.
 */

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

import java.nio.channels.FileChannel;

public class Main {
    /**
     * Copies a file.
     *
     * @param source The source file.
     * @param destination The destination file.
     * @param overwrite <i>true</i> to delete the file if it already exists.
     * @throws IOException Thrown if there is a problem copying or if the file already exists and
     *                     <b>overwrite</b> is <i>false</i>.
     */
    public static void copyFile(File source, File destination,
            boolean overwrite) throws IOException {
        FileChannel inputChannel = null;
        FileChannel outputChannel = null;

        if (destination.exists()) {
            if (overwrite) {
                if (!destination.delete()) {
                    throw new IOException(
                            "Unable to delete the destination file.");
                }
            } else {
                throw new IOException("The file already exists.");
            }
        }

        try {
            inputChannel = new FileInputStream(source).getChannel();
            outputChannel = new FileOutputStream(destination).getChannel();
            outputChannel
                    .transferFrom(inputChannel, 0, inputChannel.size());
        } finally {
            if (inputChannel != null && inputChannel.isOpen()) {
                inputChannel.close();
            }
            if (outputChannel != null && outputChannel.isOpen()) {
                outputChannel.close();
            }
        }
    }
}

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)
6. copyFile(File source, File destination, long chunkSize, boolean overwrite)
7. copyFile(File source, File target)
8. copyFile(File source, File target)
9. copyFile(File source, File target)