Here you can find the source of readFile(File srcFile, OutputStream destStream)
public static void readFile(File srcFile, OutputStream destStream) throws IOException
//package com.java2s; /*// w w w.ja va2 s. com * Copyright 2002-2010 The Rector and Visitors of the * University of Virginia. All rights reserved. * * 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.File; import java.io.FileInputStream; import java.io.IOException; import java.io.OutputStream; public class Main { public static void readFile(File srcFile, OutputStream destStream) throws IOException { FileInputStream srcStream = new FileInputStream(srcFile); byte[] buf = new byte[65535]; int bytesRead; while (true) { bytesRead = srcStream.read(buf); if (bytesRead == -1) { break; } else { destStream.write(buf, 0, bytesRead); } } } }