简单写法:

@Componentpublic class AddMyBeanFactory implements BeanFactoryPostProcessor {    @Override    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {        //实例化bean        MemberReaderServiceImpl readerService = new MemberReaderServiceImpl();        //注册单例bean        beanFactory.registerSingleton("memberReadService", readerService);    }}

用途:在RPC创建动态bean的时候,可以在此处动态创建实例化代理类的方法.可以自定义注解,来使用动态创建代理接口的bean.

@Componentpublic class MyAnnotationAddBeanFactory implements BeanFactoryPostProcessor {    @Override    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {                //1. 扫描指定路径的接口,取得指定需要代理的接口                //2. 根据动态代理,创建bean.        //3. 注册bean到 spring bean里面.    }}