接上一篇https://blog.csdn.net/qq_26437925/article/details/144865082

探究一下beanPostProcessors怎么加进来的

首先register(annotatedClasses);后添加了重要的beanDefinition: ConfigurationClassPostProcessor

invokeBeanFactoryPostProcessors(beanFactory);执行后添加了ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor

具体是invokeBeanFactoryPostProcessors(registryProcessors, beanFactory);执行后添加的

执行了ConfigurationClassPostProcessor的postProcessBeanFactory方法

/*** Prepare the Configuration classes for servicing bean requests at runtime* by replacing them with CGLIB-enhanced subclasses.*/
@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {int factoryId = System.identityHashCode(beanFactory);if (this.factoriesPostProcessed.contains(factoryId)) {throw new IllegalStateException("postProcessBeanFactory already called on this post-processor against " + beanFactory);}this.factoriesPostProcessed.add(factoryId);if (!this.registriesPostProcessed.contains(factoryId)) {// BeanDefinitionRegistryPostProcessor hook apparently not supported...// Simply call processConfigurationClasses lazily at this point then.processConfigBeanDefinitions((BeanDefinitionRegistry) beanFactory);}enhanceConfigurationClasses(beanFactory);beanFactory.addBeanPostProcessor(new ImportAwareBeanPostProcessor(beanFactory));
}

进行代理后，添加了BeanPostProcessor，new了一个ImportAwareBeanPostProcessor

registerBeanPostProcessors(beanFactory);执行完继续添加了几个BeanPostProcessor

多加了4个：

• AutowiredAnnotationBeanPostProcessor
• CommonAnnotationBeanPostProcessor
• AnnotationAwareAspectJAutoProxyCreator
• PostProcessorRegistrationDelegate$BeanPostProcessorChecker

内置的3个BeanPostProcessor ，加上new出来的BeanPostProcessorChecker

直接实例化了BeanPostProcessor:

onRefresh()方法前有7个BeanPostProcessor

这些BeanPostProcessor为后续的bean实例化服务

如 https://blog.csdn.net/qq_26437925/article/details/144796129： AutowiredAnnotationBeanPostProcessor 就能完成对@Autowired的处理