Java BufferedInputStream Copy copyFile(File from, File to)

Description

copy File

License

Open Source License

Declaration

public static void copyFile(File from, File to) throws IOException 

Method Source Code

//package com.java2s;
/*// ww w.  j  ava 2 s.  c o  m
** Tim Endres' utilities package.
** Copyright (c) 1997 by Tim Endres
** 
** This program is free software.
** 
** You may redistribute it and/or modify it under the terms of the GNU
** General Public License as published by the Free Software Foundation.
** Version 2 of the license should be included with this distribution in
** the file LICENSE, as well as License.html. If the license is not
** included   with this distribution, you may find a copy at the FSF web
** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the
** Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA.
**
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE. 
** 
*/

import java.io.*;

public class Main {
    public static void copyFile(File from, File to) throws IOException {
        int bytes;
        long length;
        long fileSize;

        BufferedInputStream in = null;
        BufferedOutputStream out = null;

        try {
            in = new BufferedInputStream(new FileInputStream(from));
        } catch (IOException ex) {
            throw new IOException(
                    "FileUtilities.copyFile: opening input stream '" + from.getPath() + "', " + ex.getMessage());
        }

        try {
            out = new BufferedOutputStream(new FileOutputStream(to));
        } catch (Exception ex) {
            try {
                in.close();
            } catch (IOException ex1) {
            }
            throw new IOException(
                    "FileUtilities.copyFile: opening output stream '" + to.getPath() + "', " + ex.getMessage());
        }

        byte[] buffer;
        buffer = new byte[8192];
        fileSize = from.length();

        for (length = fileSize; length > 0;) {
            bytes = (int) (length > 8192 ? 8192 : length);

            try {
                bytes = in.read(buffer, 0, bytes);
            } catch (IOException ex) {
                try {
                    in.close();
                    out.close();
                } catch (IOException ex1) {
                }
                throw new IOException("FileUtilities.copyFile: reading input stream, " + ex.getMessage());
            }

            if (bytes < 0)
                break;

            length -= bytes;

            try {
                out.write(buffer, 0, bytes);
            } catch (IOException ex) {
                try {
                    in.close();
                    out.close();
                } catch (IOException ex1) {
                }
                throw new IOException("FileUtilities.copyFile: writing output stream, " + ex.getMessage());
            }
        }

        try {
            in.close();
            out.close();
        } catch (IOException ex) {
            throw new IOException("FileUtilities.copyFile: closing file streams, " + ex.getMessage());
        }
    }
}

Related

1. copyFile(File file, File ziel)
2. copyFile(File from, File to)
3. copyFile(File from, File to)
4. copyFile(File from, File to)
5. copyFile(File fromFile, File toFile)