Java FileChannel Copy copyFile(File inFile, File outFile)

Description

Copy a file using java.nio

License

Open Source License

Parameter

Parameter	Description
inFile	source file
outFile	destination file

Exception

Parameter	Description
IOException	if anything bad happens.

Declaration

public static void copyFile(File inFile, File outFile) throws IOException 

Method Source Code

//package com.java2s;
/*// ww w.j a  v  a  2s. c o m
 * org.daisy.util (C) 2005-2008 Daisy Consortium
 * 
 * This library 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 2.1 of the License, or (at your option)
 * any later version.
 * 
 * This library 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 library; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

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

import java.nio.channels.FileChannel;

public class Main {
    /**
     * Copy a file using java.nio
     * 
     * @param inFile
     *            source file
     * @param outFile
     *            destination file
     * @throws IOException
     *             if anything bad happens.
     */

    public static void copyFile(File inFile, File outFile) throws IOException {
        copyFile(inFile, outFile, false);
    }

    /**
     * Copy a file using java.nio
     * 
     * @param inFile
     *            source file
     * @param outFile
     *            destination file
     * @param keepLastModified
     *            keep the "last modified" date from the input file
     * @throws IOException
     *             if anything bad happens.
     */

    public static void copyFile(File inFile, File outFile, boolean keepLastModified) throws IOException {
        if (inFile.equals(outFile))
            return;
        if (!inFile.isFile())
            throw new IOException(inFile.getAbsolutePath() + " is not a file");
        if (outFile.exists()) {
            if (!outFile.isFile()) {
                throw new IOException(outFile.getAbsolutePath() + " is not a file");
            }
        } else {
            createDirectory(outFile.getParentFile());
            outFile.createNewFile();
        }

        FileChannel source = null;
        FileChannel destination = null;
        try {
            source = new FileInputStream(inFile).getChannel();
            destination = new FileOutputStream(outFile).getChannel();
            destination.transferFrom(source, 0, source.size());
        } finally {
            if (source != null) {
                source.close();
            }
            if (destination != null) {
                destination.close();
            }
        }
        if (keepLastModified) {
            outFile.setLastModified(inFile.lastModified());
        }
    }

    /**
     * Make sure a directory exists.
     * @param dir
     * @throws IOException
     *             if the dir could not be created or if a regular file with the
     *             specified name exists.
     */
    public static File createDirectory(File dir) throws IOException {
        if (!dir.exists()) {
            boolean result = dir.mkdirs();
            if (!result) {
                throw new IOException("Could not create directory " + dir);
            }
        } else if (!dir.isDirectory()) {
            throw new IOException(dir + " already exists and is not a directory");
        }
        return dir;
    }
}

Related

1. copyFile(File in, File out)
2. copyFile(File in, File out)
3. copyFile(File in, File out)
4. copyFile(File in, File out)
5. copyfile(File infile, File outfile)
6. copyFile(File inputFile, File outputFile)
7. copyFile(File source, File dest)
8. copyFile(File source, File dest)
9. copyFile(File source, File dest)