Java tutorial
//package com.java2s; import java.io.BufferedInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; public class Main { public static byte[] readFromInputStream(InputStream inputStream) throws IOException { if (inputStream == null) return null; BufferedInputStream bin = new BufferedInputStream(inputStream); ByteArrayOutputStream bos = new ByteArrayOutputStream(); byte[] buffer = new byte[1024 * 8]; int len = 0; while ((len = bin.read(buffer)) != -1) { bos.write(buffer, 0, len); } bin.close(); return bos.toByteArray(); } }