Spring的容器创建过程，refresh()方法的执行

public void refresh() throws BeansException, IllegalStateException {
		synchronized (this.startupShutdownMonitor) {
			// Prepare this context for refreshing.
			prepareRefresh();

			// Tell the subclass to refresh the internal bean factory.
			ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory();

			// Prepare the bean factory for use in this context.
			prepareBeanFactory(beanFactory);

			try {
				// Allows post-processing of the bean factory in context subclasses.
				postProcessBeanFactory(beanFactory);

				// Invoke factory processors registered as beans in the context.
				invokeBeanFactoryPostProcessors(beanFactory);

				// Register bean processors that intercept bean creation.
				registerBeanPostProcessors(beanFactory);

				// Initialize message source for this context.
				initMessageSource();

				// Initialize event multicaster for this context.
				initApplicationEventMulticaster();

				// Initialize other special beans in specific context subclasses.
				onRefresh();

				// Check for listener beans and register them.
				registerListeners();

				// Instantiate all remaining (non-lazy-init) singletons.
				finishBeanFactoryInitialization(beanFactory);

				// Last step: publish corresponding event.
				finishRefresh();
			}

			catch (BeansException ex) {
				if (logger.isWarnEnabled()) {
					logger.warn("Exception encountered during context initialization - " +
							"cancelling refresh attempt: " + ex);
				}

				// Destroy already created singletons to avoid dangling resources.
				destroyBeans();

				// Reset 'active' flag.
				cancelRefresh(ex);

				// Propagate exception to caller.
				throw ex;
			}

			finally {
				// Reset common introspection caches in Spring's core, since we
				// might not ever need metadata for singleton beans anymore...
				resetCommonCaches();
			}
		}
	}

这段代码记录IOC容器的完整创建过程，我这里记录了部分关键的事件，共同学习，希望能帮到你

总结一下：

一、Spring容器在启动的时候，先会保存所有注册进来的Bean的定义信息；
        1、xml注册bean；<bean>
        2、注解注册Bean；@Service、@Component、@Bean、xxx
二、Spring容器会合适的时机创建这些Bean
        1、用到这个bean的时候；利用getBean创建bean；创建好以后保存在容器中；
        2、统一创建剩下所有的bean的时候；finishBeanFactoryInitialization()；
三、后置处理器；BeanPostProcessor
        1、每一个bean创建完成，都会使用各种后置处理器进行处理；来增强bean的功能；
            AutowiredAnnotationBeanPostProcessor:处理自动注入
            AnnotationAwareAspectJAutoProxyCreator:来做AOP功能；
            xxx....
            增强的功能注解：
            AsyncAnnotationBeanPostProcessor
            ....
四、事件驱动模型；
        ApplicationListener；事件监听；
        ApplicationEventMulticaster；事件派发：