spring bean初始化过程

SpringBean 初始化过程ClassPathXmlApplication reflsh()//记录执行时间prepareRefresh();//主要是创建beanFactory(DefaultListableBeanFactory)，同时加载配置文件.xml中的beanDefinition  //通过String[] configLocations = getConfigLocations()获取资源路径，//加载beanDefinition(XmlBeanDefinitionReader.loadBeanDefinitions(configLocations))  ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory();//准备beanFactory//设置默认的组件（classLoader）prepareBeanFactory(beanFactory);try {//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传播组建，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) {// Destroy already created singletons to avoid dangling resources.destroyBeans();// Reset 'active' flag.cancelRefresh(ex);// Propagate exception to caller.throw ex;}