Spring源码解析-applicationContext

《Spring源码解析-applicationContext》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Spring源码解析-applicationContextDemouml类图ApplicationContextApplicationListener源码解析主流程obtainFreshBeanFactoryprepareBeanFactoryinvokeBeanFactoryPostProcessorsregisterBeanPostProcessorsregisterListenersfinishRefresh总结在已经有BeanFactory可以完成Ioc功能情况下，spring又提供了ApplicationContext，why

2、？可以简单理解BeanFactory为可用，ApplicationContext封装了Beanfactory，提供了上下文、国际化、监听等更多的可选功能，让其能用，使用时，优先使用ApplicationContext。Demo跟beanfactory的demo唯一不同的就是：//BeanFactoryctx=newXmlBeanFactory(newClassPathResource("spring.xml"));ApplicationContextctx=newClassPathXmlApplicationContext("sprin

3、g.xml");uml类图ApplicationContextapplicationContextApplicationListenerApplicationListener源码解析主流程//ClassPathXmlApplicationContextpublicClassPathXmlApplicationContext(String[]configLocations,booleanrefresh)throwsBeansException{this(configLocations,refresh,null);}publicClassP

4、athXmlApplicationContext(String[]configLocations,booleanrefresh,ApplicationContextparent)throwsBeansException{super(parent);//设置configLocationssetConfigLocations(configLocations);if(refresh){refresh();}}//AbstractApplicationContextpublicvoidrefresh()throwsBeansException,

5、IllegalStateException{synchronized(this.startupShutdownMonitor){//设置和校验系统变量和环境变量的值prepareRefresh();//获取beanFactoryConfigurableListableBeanFactorybeanFactory=obtainFreshBeanFactory();//配置BeanFactory上下文prepareBeanFactory(beanFactory);try{//子类扩展，beanFactory的后置处理postProcessB

6、eanFactory(beanFactory);//调用BeanFactory的后置处理器invokeBeanFactoryPostProcessors(beanFactory);//注册beanprocessors，只是注册，bean创建时调用.registerBeanPostProcessors(beanFactory);//国际化initMessageSource();//初始化监听的Multicaster，有自定义就是用自定义，没有就使用默认SimpleApplicationEventMulticasterinitApplica

7、tionEventMulticaster();//子类扩展onRefresh();//注册listenregisterListeners();//实例化所有非延迟加载的bean，相当于循环调用getbeanfinishBeanFactoryInitialization(beanFactory);//完成刷新，通知LifecycleProcessor，ContextRefreshedEvent事件（这个很有用，可以监听这个事件）finishRefresh();}catch(BeansExceptionex){//Destroyalread

8、ycreatedsingletonstoavoiddanglingresources.destroyBeans();//Reset'active'flag.cancelRefresh(ex);//Propa