ApplicationContext的refresh过程

 onRefresh

添加addBeanPostProcessor(new ImportAwareBeanPostProcessor

refreshBeanFactory

getEnvironment().validateRequiredProperties()

通过ClassPathBeanDefinitionScanner对配置类进行解析，扫描指定路径下指定注解的Bean，并注册Bean

如果有自定义BeanFactoryPostProcessor，且类型为BeanDefinitionRegistryPostProcessor，回首先得到执行

prepareBeanFactory设置ClassLoader、设置两个BeanPostProcessor（ApplicationContextAwareProcessor、ApplicationListenerDetector）设置依赖注入时需要忽略的接口（主要为aware接口）注册特殊注入的接口类型（BeanFactory、ResourceLoader、ApplicationEventPublisher、ApplicationContext）容器中放入Environment、SystemProperties、SystemEnvironment、ApplicationStartup四个实例

clearResourceCaches

spring.context.config-classes.parse解析配置类

postProcessBeanDefinitionRegistry

ConfigurationClassPostProcessor.postProcessBeanFactory

PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors

查找BeanFactory中的所有BeanDefinitionRegistryPostProcessor类型的Bean定义并按照PriorityOrdered->Ordered->其他的顺序依次执行当前ConfigurationClassPostProcessorpost.ProcessBeanDefinitionRegistry

finishBeanFactoryInitialization完成Bean定义中剩余为实例化的类的实例化工作，并调用SmartInitializingSingleton接口的实例的afterSingletonsInstantiated方法，这里是EventListenerMethodProcessor

spring.context.beans.post-process BeanFactory初始化完成后的处理机制

finishRefresh

initApplicationEventMulticaster

执行LifecycleProcessor的onRefresh方法

spring.context.bean-factory.post-process

spring.context.config-classes.enhance

这三步完成了BeanFactory的初始化

spring.context.beandef-registry.post-process Bean定义注册完成后处理机制

getBeanFactory()

publishEvent：ContextRefreshedEvent;

EventListenerMethodProcessor注册所有EventListener注解的方法为单独的ApplicationListener实例

prepareRefresh

org.springframework.context.support.AbstractApplicationContext#invokeBeanFactoryPostProcessors->ConfigurationClassPostProcessor->invokeBeanFactoryPostProcessors->PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors

在Bean初始化（目前为止未初始化的）前后调用

ConfigurationClassBeanDefinitionReader处理配置类中Bean注解的类的注册处理import的配置的Bean的注册

initPropertySources

初始化MessageSourceinitMessageSource

注册BeanPostProcessor-》org.springframework.context.support.AbstractApplicationContext#registerBeanPostProcessorsorg.springframework.context.annotation.internalAutowiredAnnotationProcessororg.springframework.context.annotation.internalCommonAnnotationProcessorBeanPostProcessorCheckerApplicationListenerDetector自定义BeanPostProcessor

自定义BeanFactoryPostProcessor执行

initLifecycleProcessor，该生命周期钩子需要Context创建后显式调用，如果是SmartLifecycle的实现则Spring会自动调用

obtainFreshBeanFactory

registerListeners

找到具有Configuration注解的Bean定义并按照@Order注解定义的顺序排序