Here you can find the source of copyBytes(InputStream in, OutputStream out)
public static int copyBytes(InputStream in, OutputStream out) throws IOException
//package com.java2s; /* 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 * // w ww . j av a2s. com * 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 BUFFERSIZE = 4096; public static int copyBytes(InputStream in, OutputStream out) throws IOException { if (in == null || out == null) { throw new IllegalArgumentException("In/OutStream cannot be null"); } int total = 0; byte[] buffer = new byte[BUFFERSIZE]; for (int bytesRead; (bytesRead = in.read(buffer)) != -1;) { out.write(buffer, 0, bytesRead); total += bytesRead; } return total; } }