Here you can find the source of readBytes(InputStream inputStream)
public static byte[] readBytes(InputStream inputStream) throws IOException
//package com.java2s; /*/* w ww. j av a2 s .c o m*/ * Copyright (C) 2010 Teleal GmbH, Switzerland * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.io.IOException; import java.io.InputStream; import java.io.ByteArrayOutputStream; public class Main { public static byte[] readBytes(InputStream inputStream) throws IOException { assert inputStream != null; ByteArrayOutputStream bos = new ByteArrayOutputStream(); try { int b; while ((b = inputStream.read()) != -1) { bos.write(b); } } finally { inputStream.close(); } return bos.toByteArray(); } }