spring-refresh-prepareBeanFactory-ApplicationListenerDetector

在spring启动刷新的时候，会有一个准备工作也就是prepareBeanFactory方法，里面会添加BeanPostProcessor，也就是本文要说的ApplicationListenerDetector
prepareBeanFactory(beanFactory);

protected void prepareBeanFactory(ConfigurableListableBeanFactory beanFactory) {
....
beanFactory.addBeanPostProcessor(new ApplicationListenerDetector(this));
....
}

ApplicationListenerDetector属于BeanPostProcessor类型，所以任何bean的实例化，包括spring自带的bean，只要调用doGetBean创建bean

spring-refresh-prepareBeanFactory-ApplicationListenerDetector最先出现在Python成神之路。