Java InputStream to OutputStream copyStream(final InputStream in, final OutputStream out)

Description

Copy stream.

License

Open Source License

Parameter

Parameter	Description
in	the input stream
out	the output stream

Exception

Parameter	Description
IOException	for any IO error

Declaration

public static void copyStream(final InputStream in, final OutputStream out) throws IOException 

Method Source Code

//package com.java2s;
/*/*from  w w  w.  ja  v a 2s. com*/
 * JBoss, Home of Professional Open Source.
 * Copyright 2011, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

import java.io.*;

public class Main {
    /**
     * Copy stream.
     *
     * @param in  the input stream
     * @param out the output stream
     * @throws IOException for any IO error
     */
    public static void copyStream(final InputStream in, final OutputStream out) throws IOException {
        final byte[] bytes = new byte[8192];
        int cnt;
        while ((cnt = in.read(bytes)) != -1) {
            out.write(bytes, 0, cnt);
        }
    }

    /**
     * Copy stream.
     *
     * @param in     the input stream
     * @param out    the output stream
     * @param offset how many input bytes should be skipped
     * @throws IOException for any IO error
     */
    public static void copyStream(final InputStream in, final OutputStream out, long offset) throws IOException {
        skip(in, offset);
        copyStream(in, out);
    }

    /**
     * Copy stream.
     *
     * @param in     the input stream
     * @param out    the output stream
     * @param offset how many input bytes should be skipped
     * @param length how many bytes should be copied
     * @throws IOException for any IO error
     */
    public static void copyStream(final InputStream in, final OutputStream out, long offset, long length)
            throws IOException {
        skip(in, offset);
        copyStreamBounded(in, out, length);
    }

    public static void skip(InputStream stream, long count) throws IOException {
        while (count > 0) {
            count -= stream.skip(count);
        }
    }

    public static void copyStreamBounded(InputStream in, OutputStream out, long length) throws IOException {
        final byte[] bytes = new byte[8192];
        long totalCount = 0;
        while (totalCount < length) {
            int len = (int) Math.min(bytes.length, length - totalCount);
            int count = in.read(bytes, 0, len);
            if (count == -1) {
                throw new EOFException("Reached end of stream prematurely.");
            }
            out.write(bytes, 0, count);
            totalCount += count;
        }
    }
}

Related

1. copyStream(@Nonnull InputStream in, @Nonnull OutputStream out)
2. copyStream(ByteArrayOutputStream source, ByteArrayOutputStream target)
3. copyStream(final InputStream in, final OutputStream out)
4. copyStream(final InputStream in, final OutputStream out, final int bufferSize)
5. copyStream(final InputStream in, final OutputStream out, int iMax)
6. copyStream(final InputStream input, final OutputStream output, long count)
7. copyStream(final InputStream inputStream, final OutputStream out)