本文主要是介绍AbstractApplicationContext，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
spring初始化Ioc容器很重要的一个方法是由ApplicationContext子接口ConfigurableApplicationContext提供的refresh(),这个方法的作用是创建加载Spring容器配置（包括.xml配置，property文件和数据库模式等）。下面是各个refresh()调用的各个方法的作用解析：
@Override public void refresh() throws BeansException, IllegalStateException { synchronized (this.startupShutdownMonitor) { // Prepare this context for refreshing. prepareRefresh(); // Tell the subclass to refresh the internal bean factory. //主要是创建beanFactory，同时加载配置文件.xml中的beanDefinition //通过String[] configLocations = getConfigLocations()获取资源路径，然后加载beanDefinition ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory(); // Prepare the bean factory for use in this context. //给beanFactory注册一些标准组建，如ClassLoader，StandardEnvironment，BeanProcess prepareBeanFactory(beanFactory); try { // Allows post-processing of the bean factory in context subclasses. //提供给子类实现一些postProcess的注册，如AbstractRefreshableWebApplicationContext注册一些Servlet相关的 //postProcess，真对web进行生命周期管理的Scope，通过registerResolvableDependency()方法注册指定ServletRequest，HttpSession，WebRequest对象的工厂方法 postProcessBeanFactory(beanFactory); // Invoke factory processors registered as beans in the context. //调用所有BeanFactoryProcessor的postProcessBeanFactory()方法 invokeBeanFactoryPostProcessors(beanFactory); // Register bean processors that intercept bean creation. //注册BeanPostProcessor，BeanPostProcessor作用是用于拦截Bean的创建 registerBeanPostProcessors(beanFactory); // Initialize message source for this context. //初始化消息Bean initMessageSource(); // Initialize event multicaster for this context. //初始化上下文的事件多播组建，ApplicationEvent触发时由multicaster通知给ApplicationListener initApplicationEventMulticaster(); // Initialize other special beans in specific context subclasses. //ApplicationContext初始化一些特殊的bean onRefresh(); // Check for listener beans and register them. //注册事件监听器，事件监听Bean统一注册到multicaster里头，ApplicationEvent事件触发后会由multicaster广播 registerListeners(); // Instantiate all remaining (non-lazy-init) singletons. //非延迟加载的单例Bean实例化 finishBeanFactoryInitialization(beanFactory); // Last step: publish corresponding event. finishRefresh(); } catch (BeansException ex) { 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; } } } 转自http://blog.csdn.net/bubaxiu/article/details/41380683
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