Java tutorial
//package com.java2s; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; public class Main { public static long readStream(InputStream in, OutputStream out) { long ret = 0; if (in != null && out != null) { byte[] buf = new byte[128]; int len; try { while (true) { len = in.read(buf); if (len == -1) { break; } ret += len; out.write(buf, 0, len); } } catch (IOException e) { e.printStackTrace(); } buf = null; } return ret; } /** * * @param inputStream * @return */ public static byte[] readStream(InputStream inputStream) { byte[] ret = null; if (inputStream != null) { ByteArrayOutputStream bout = null; bout = new ByteArrayOutputStream(); readStream(inputStream, bout); ret = bout.toByteArray(); close(bout); bout = null; } return ret; } public static void close(Object stream) { if (stream != null) { if (stream instanceof InputStream) { try { ((InputStream) stream).close(); } catch (IOException e) { e.printStackTrace(); } } if (stream instanceof OutputStream) { try { ((OutputStream) stream).close(); } catch (IOException e) { e.printStackTrace(); } } } } }