public static void main(String[] args) {
        ReferenceConfig<DemoService> reference = new ReferenceConfig<>();
        reference.setApplication(new ApplicationConfig("dubbo-demo-api-consumer"));
        reference.setRegistry(new RegistryConfig("zookeeper://127.0.0.1:2181"));
        reference.setInterface(DemoService.class);
        reference.setGeneric(true);
        
        Object obj = reference.get();
        for(Class c : obj.getClass().getInterfaces()) {
            System.err.println(c);
        }
        DemoService service = reference.get();
        String message = service.sayHello("dubbo");
        System.out.println(message);
    }