Copy a file from one file to another. - Java File Path IO

Java examples for File Path IO:File Copy

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Description

Copy a file from one file to another.

Demo Code

/**/*from w  w  w .  j av  a  2 s  .  c o  m*/
 * e-Science Central
 * Copyright (C) 2008-2013 School of Computing Science, Newcastle University
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation at:
 * http://www.gnu.org/licenses/gpl-2.0.html
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301, USA.
 */
import java.io.*;
import java.util.zip.*;
import java.util.*;

public class Main{
    /** 
     * Copy a file from one file to another.
     * This is a convenience method equivalent to calling
     * <code>{@link #copyFile(File, File) copyFile(source, new File(targetDir, source.getName())}</code>.
     */
    public static void copyFileToDirectory(File source, File targetDir)
            throws IOException {
        copyFile(source, new File(targetDir, source.getName()));
    }
    /** Copy a file from one file to another */
    public static void copyFile(File source, File target)
            throws IOException {
        if (source.exists()) {
            FileInputStream inStream = null;
            BufferedOutputStream outStream = null;
            try {
                inStream = new FileInputStream(source);
                outStream = new BufferedOutputStream(new FileOutputStream(
                        target));
                byte[] buffer = new byte[4096];
                int len;
                while ((len = inStream.read(buffer)) > 0) {
                    outStream.write(buffer, 0, len);
                }
            } finally {
                if (inStream != null) {
                    try {
                        inStream.close();
                    } catch (IOException ignore) {
                    }
                }
                if (outStream != null) {
                    try {
                        outStream.close();
                    } catch (IOException ignore) {
                    }
                }
            }
        }
    }
    /** Copy a file from one file to another with a listener */
    public static void copyFile(File source, File target,
            InstrumentedInputStreamListener listener) throws IOException {
        if (source.exists()) {
            InstrumentedInputStream inStream = null;
            BufferedOutputStream outStream = null;
            try {
                inStream = new InstrumentedInputStream(new FileInputStream(
                        source), listener);
                outStream = new BufferedOutputStream(new FileOutputStream(
                        target));
                byte[] buffer = new byte[4096];
                int len;
                while ((len = inStream.read(buffer)) > 0) {
                    outStream.write(buffer, 0, len);
                }
            } finally {
                if (inStream != null) {
                    try {
                        inStream.close();
                    } catch (IOException ignore) {
                    }
                }
                if (outStream != null) {
                    try {
                        outStream.close();
                    } catch (IOException ignore) {
                    }
                }
            }
        }
    }
}

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