Java BufferedInputStream Copy copyFile(final File to, final File from)

Description

Copy the contents of a file.

License

Apache License

Parameter

Parameter	Description
to	The file to be copied to (must already exist).
from	The file to be copied from.

Declaration

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

Method Source Code

//package com.java2s;
/*/*  www. j  a v  a2 s .c  o m*/
 * Copyright (C) 2015 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed 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.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Main {
    private static final int BUF_SIZE = 1024;

    /**
     * Copy the contents of a file.
     * 
     * @param to
     *          The file to be copied to (must already exist).
     * @param from
     *          The file to be copied from.
     */
    public static void copyFile(final File to, final File from) throws IOException {
        BufferedInputStream reader = new BufferedInputStream(new FileInputStream(from));
        BufferedOutputStream writer = new BufferedOutputStream(new FileOutputStream(to));

        copyStream(writer, reader);

        writer.close();
        reader.close();
    }

    /**
     * Copy one stream to another until the input stream has no more data.
     * 
     * @param to
     *          The open stream to write to.
     * @param from
     *          The open stream to read from.
     */
    public static void copyStream(final OutputStream to, final InputStream from) throws IOException {
        final byte[] buf = new byte[BUF_SIZE];
        int len = from.read(buf);
        while (len > 0) {
            to.write(buf, 0, len);
            len = from.read(buf);
        }
    }
}

Related

1. copyFile(final File source, final File dest, final boolean overwrite)
2. copyFile(final File source, final File destination)
3. copyFile(final File source, final File destination, final boolean overwrite)
4. copyFile(final File sourceFile, final File targetFile)
5. copyFile(final File src, final File dest)
6. copyFile(InputStream is, File newFile)
7. copyFile(InputStream src, File dest)
8. copyFile(InputStream src, File dst)
9. copyFile(String dest_path, String src_path)