ByteArrayOutputStream out = new ByteArrayOutputStream();
HessianOutput output = new HessianOutput(out);
output.writeObject(new User("Jim", 20));
byte[] bytes = out.toByteArray();

System.err.println(bytes);
ByteArrayInputStream in = new ByteArrayInputStream(bytes);
HessianInput input= new HessianInput(in);
User u = (User) input.readObject();
System.err.println(u);