Java tutorial
//package com.java2s; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; public class Main { public static int BUFFER_SIZE = 2048; public static byte[] inputStreamToByte(InputStream in) throws IOException { ByteArrayOutputStream outStream = new ByteArrayOutputStream(); byte[] data = new byte[BUFFER_SIZE]; int count = -1; while ((count = in.read(data, 0, BUFFER_SIZE)) != -1) outStream.write(data, 0, count); data = null; return outStream.toByteArray(); } }