Java InputStream Copy nio copyStream(final InputStream is, final OutputStream os)

Description

copy Stream

License

Apache License

Declaration

public static long copyStream(final InputStream is, final OutputStream os) throws IOException 

Method Source Code

//package com.java2s;
/*//from   w w w.  j  a v  a2  s  .com
 * Copyright 2007 Matthias L. Jugel.
 *
 * 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;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;

public class Main {
    public static long copyStream(final InputStream is, final OutputStream os) throws IOException {
        ReadableByteChannel rbc = Channels.newChannel(is);
        WritableByteChannel wbc = Channels.newChannel(os);

        int bytesWritten = 0;
        final ByteBuffer buffer = ByteBuffer.allocateDirect(16 * 1024);
        while (rbc.read(buffer) != -1) {
            buffer.flip();
            bytesWritten += wbc.write(buffer);
            buffer.compact();
        }
        buffer.flip();
        while (buffer.hasRemaining()) {
            bytesWritten += wbc.write(buffer);
        }

        rbc.close();
        wbc.close();

        return bytesWritten;
    }
}

Related

1. copy(InputStream input, OutputStream output)
2. copy(InputStream src, File dst)
3. copy(InputStream stream, File file)
4. copyStream(final InputStream aInStream, final OutputStream aOutStream)
5. copyStream(final InputStream in)
6. copyStream(InputStream in, OutputStream out)
7. copyStream(InputStream input, OutputStream output)
8. copyStream(InputStream src, OutputStream dest)