Java FileChannel Copy copyFile(File src, File dest)

Description

Copies a file to a new location preserving the file date.

License

Open Source License

Parameter

Parameter	Description
src	An existing file to copy, must not be <code>null</code>.
dest	The new file, must not be <code>null</code> and exist.

Exception

Parameter	Description
IOException	If copying is failed.

Declaration

public static void copyFile(File src, File dest) throws IOException 

Method Source Code

//package com.java2s;
/*//from   w  w  w  . ja v a  2s.c om
 *   casmi
 *   http://casmi.github.com/
 *   Copyright (C) 2011, Xcoo, Inc.
 *
 *  casmi is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

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

import java.nio.channels.FileChannel;

public class Main {
    /**
     * Copies a file to a new location preserving the file date.
     *
     * @param src
     *            An existing file to copy, must not be <code>null</code>.
     * @param dest
     *            The new file, must not be <code>null</code> and exist.
     *
     * @throws IOException
     *             If copying is failed.
     */
    public static void copyFile(File src, File dest) throws IOException {

        if (src == null)
            throw new NullPointerException("Source must not be null");
        if (dest == null)
            throw new NullPointerException("Destination must not be null");
        if (!src.exists())
            throw new FileNotFoundException("Source '" + src + "' does not exist");
        if (!src.isFile())
            throw new IOException("Source '" + src + "' is not a file");
        if (dest.exists())
            throw new IOException("Destination '" + dest + "' is already exists");

        FileChannel in = null, out = null;
        try {
            in = new FileInputStream(src).getChannel();
            out = new FileOutputStream(dest).getChannel();

            in.transferTo(0, in.size(), out);
        } finally {
            try {
                in.close();
                out.close();
            } catch (IOException e) {
                // Ignore.
            }
        }

        if (src.length() != dest.length()) {
            throw new IOException("Failed to copy full contents from '" + src + "' to '" + dest + "'");
        }

        dest.setLastModified(src.lastModified());
    }
}

Related

1. copyFile(File sourceFile, File destinationFile)
2. copyFile(File sourceFile, File targetFile)
3. copyFile(File sourceFile, File targetFile)
4. copyFile(File sourceFile, File targetFile)
5. copyFile(File src, File dest)
6. copyFile(File src, File dest)
7. copyFile(File src, File dest)
8. copyFile(File src, File destination)
9. copyFile(File src, File destination)