Here you can find the source of copyStream(final InputStream inputStream, final OutputStream outputStream)
public static void copyStream(final InputStream inputStream, final OutputStream outputStream) throws IOException
//package com.java2s; /*//from ww w . j a va 2 s .co m * Copyright 2016 SimplifyOps, Inc. (http://simplifyops.com) * * 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.*; public class Main { public static void copyStream(final InputStream inputStream, final OutputStream outputStream) throws IOException { final byte[] buffer = new byte[1024 * 4]; int c; while (-1 != (c = inputStream.read(buffer))) { outputStream.write(buffer, 0, c); } } }