Java FileChannel Copy copyFile(File srcFile, File dstFile, boolean overwrite)

Description

copy File

License

Apache License

Declaration

public static void copyFile(File srcFile, File dstFile, boolean overwrite) throws IOException 

Method Source Code

//package com.java2s;
/**// w w w .  ja  v  a 2  s . c  o m
 * Copyright ? 2012 Alcatel-Lucent.
 *
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 * Licensed to you 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 {
    public static void copyFile(File srcFile, File dstFile, boolean overwrite) throws IOException {

        // preconditions check
        if (dstFile.isDirectory())
            throw new IOException("copyFile: destination is a directory: " + dstFile.getAbsolutePath());

        if (dstFile.exists() && !overwrite)
            throw new IOException("copyFile: destination file already exists: " + dstFile.getAbsolutePath());

        FileChannel srcChannel = null;
        FileChannel dstChannel = null;

        try {
            srcChannel = new FileInputStream(srcFile).getChannel();
            dstChannel = new FileOutputStream(dstFile).getChannel();

            long transfered = 0;
            long size = srcChannel.size();

            while ((transfered += srcChannel.transferTo(0, size - transfered, dstChannel)) < size)
                ;

        } finally {
            if (srcChannel != null)
                srcChannel.close();

            if (dstChannel != null)
                dstChannel.close();
        }
    }
}

Related

1. copyFile(File src, File target)
2. copyFile(File src, File target)
3. copyFile(File srcFile, File destFile, boolean preserveFileDate)
4. copyFile(File srcFile, File destFile, boolean preserveFileDate)
5. copyFile(File srcFile, File destFile, boolean preserveFileDate)
6. copyFile(FileChannel in, FileChannel out)
7. copyFile(FileInputStream fromFile, FileOutputStream toFile)
8. copyFile(final File in, final File out)
9. copyFile(final File in, final File out)