Java InputStream Copy copyLarge(InputStream input, OutputStream output)

Description

Copy bytes from a large (over 2GB) InputStream to an OutputStream.

License

Apache License

Parameter

Parameter	Description
input	the <code>InputStream</code> to read from
output	the <code>OutputStream</code> to write to

Exception

Parameter	Description
NullPointerException	if the input or output is null
IOException	if an I/O error occurs

Return

the number of bytes copied

Declaration

public static long copyLarge(InputStream input, OutputStream output)
        throws IOException 

Method Source Code

//package com.java2s;
/*//  w ww.  ja va 2  s. com
 *    Copyright 2011 Ken Gilmer
 *
 *  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.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Main {
    private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;

    /**
     * Copy bytes from a large (over 2GB) <code>InputStream</code> to an
     * <code>OutputStream</code>.
     * <p>
     * This method buffers the input internally, so there is no need to use a
     * <code>BufferedInputStream</code>.
     * 
     * @param input  the <code>InputStream</code> to read from
     * @param output  the <code>OutputStream</code> to write to
     * @return the number of bytes copied
     * @throws NullPointerException if the input or output is null
     * @throws IOException if an I/O error occurs
     */
    public static long copyLarge(InputStream input, OutputStream output)
            throws IOException {
        byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
        long count = 0;
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
            count += n;
        }
        return count;
    }

    /**
     * Writes chars from a <code>String</code> to bytes on an
     * <code>OutputStream</code> using the default character encoding of the
     * platform.
     * <p>
     * This method uses {@link String#getBytes()}.
     * 
     * @param data  the <code>String</code> to write, null ignored
     * @param output  the <code>OutputStream</code> to write to
     * @throws NullPointerException if output is null
     * @throws IOException if an I/O error occurs
     */
    public static void write(String data, OutputStream output)
            throws IOException {
        if (data != null) {
            output.write(data.getBytes());
        }
    }
}

Related

1. copyLarge(InputStream input, OutputStream output)
2. copyLarge(InputStream input, OutputStream output)
3. copyLarge(InputStream input, OutputStream output)
4. copyLarge(InputStream input, OutputStream output)
5. copyLarge(InputStream input, OutputStream output)
6. copyLarge(InputStream input, OutputStream output)
7. copyLarge(InputStream input, OutputStream output)
8. copyLarge(InputStream input, OutputStream output)
9. copyLarge(InputStream input, OutputStream output)