getBean(xxx)

if bean != null

refresh()

实例化deptBean

bean = getSingleton()会调用三级缓存的getobject()

mbd.isSingleton()

在AbstractAutoProxy中的getEarlyBeanReference()中会获取早期创建的bean暴露的引用并创建代理

循环依赖

放入第三级缓存（singletonFactories），包装当前object泛型对象为SmartInstantiationAwareBeanPostProcessor，且getObject()关联getEarlyBeanReference(xxx)

将bean移入一级缓存（singletonObjects）

实例化bean

将当前bean移除singletonsCurrentlyInCreation集合

false

....

PostProcessor.postProcessBeforeInitialization

1. 当前bean有DestroyMethod；2. 存在DestructionAwareBeanPostProcessors；3. 当前bean需要Destruction；

createBean()

将当前bean放入singletonsCurrentlyInCreation集合

PostProcessor.postProcessAfterInitialization

感知容器对象BeanNameAware；BeanClassLoaderAware；BeanFactoryAware；

final RootBeanDefinition mbd = getMergedLocalBeanDefinition(beanName);

InstantiationAwareBeanPostProcessor.postProcessBeforeInstantiation()

finishBeanFactoryInitialization(beanFactory)

return beanInstance;

用来扫描收集当前bean中的注解，并且合并到当前beanDefinition中

true

singletonFactories.getObject()调用SmartInstantiationAwareBeanPostProcessor.getEarlyBeanReference(xxx)，获取提前暴露的bean引用，这里有可能创建代理（org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator#getEarlyBeanReference）

返回bean

调用InitializingBean.afterPropertiesSet()或自定义InitMethod