【spring API】BeanPostProcessor

有两个待实现方法：

public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException

public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException

单例ben的初始化和销毁顺序如下：

bean构造方法->postProcessBeforeInitialization->InitializingBean.afterPropertiesSet()(继承接口并实现)->initMethod(@bean注解属性)->postProcessAfterInitialization

DisposableBean.destroy()(继承接口并实现)->destroyMethod(@bean注解属性)

参考链接：

https://blog.youkuaiyun.com/varyall/article/details/82257202