Java InputStream Copy copyLarge(final InputStream input, final OutputStream output)

Description

Copies 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(final InputStream input, final OutputStream output) throws IOException 

Method Source Code

//package com.java2s;
/*/*  www  .  java 2s .  c om*/
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.*;

public class Main {
    /**
     * The default buffer size to use.
     */
    private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;

    /**
    * Copies bytes from a large (over 2GB) <code>InputStream</code> to an
    * <code>OutputStream</code>.
    * <p>
    * This method uses the provided buffer, so there is no need to use a
    * <code>BufferedInputStream</code>.
    * <p>
    *
    * @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
    * @since Commons IO 2.2
    */
    public static long copyLarge(final InputStream input, final 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;
    }

    /**
     * Copy chars from a large (over 2GB) <code>Reader</code> to a <code>Writer</code>.
     * <p>
     * This method buffers the input internally, so there is no need to use a
     * <code>BufferedReader</code>.
     *
     * @param input  the <code>Reader</code> to read from
     * @param output the <code>Writer</code> to write to
     * @return the number of characters copied
     * @throws NullPointerException if the input or output is null
     * @throws IOException          if an I/O error occurs
     * @since Commons IO 1.3
     */
    public static long copyLarge(Reader input, Writer output) throws IOException {
        char[] buffer = new char[DEFAULT_BUFFER_SIZE];
        long count = 0;
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
            count += n;
        }
        return count;
    }
}

Related

1. copyBytes(final InputStream is, final OutputStream os)
2. copyBytes(InputStream in, OutputStream out)
3. copyBytes(InputStream in, OutputStream out, int bufferSize, boolean close)
4. copyBytes(InputStream in, OutputStream out, int buffSize)
5. copyLarge(final InputStream input, final OutputStream output)
6. copyLarge(InputStream in, OutputStream out, byte[] buffer)
7. copyLarge(InputStream input, File outputFile)
8. copyLarge(InputStream input, OutputStream output)
9. copyLarge(InputStream input, OutputStream output)