@Override
    public <T extends ResponseCommand> boolean serializeHeader(T response)
                                                                          throws SerializationException {
        if (response instanceof RpcResponseCommand) {
            RpcResponseCommand responseCommand = (RpcResponseCommand) response;
            try {
                responseCommand.setHeader(EXECUTOR1.getBytes("UTF-8"));
            } catch (UnsupportedEncodingException e) {
                System.err.println("UnsupportedEncodingException");
            }
            return true;
        }
        return false;
    }
@see com.alipay.remoting.CustomSerializer#serializeHeader(com.alipay.remoting.rpc.ResponseCommand)
src/test/java/com/alipay/remoting/rpc/userprocessor/executorselector/CustomHeaderSerializer.java