Java InputStream Copy copyLarge(InputStream input, OutputStream output)

Here you can find the source of copyLarge(InputStream input, OutputStream output)

Description

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

License

Open Source 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;
//License from project: Open Source License 

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Main {
    /**/*from  w  w  w  .j  ava  2s  .  c om*/
     * The default buffer size to use.
     */
    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
     * @since Commons IO 1.3
     */
    public static long copyLarge(InputStream input, OutputStream output) throws IOException {
        byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
        long count = 0;
        int n;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
            count += n;
        }
        return count;
    }
}

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