Spring容器创建流程（3）对beanFactory设置

容器已经创建完成，接下来执行prepareBeanFactory（），对BeanFactory做一些设置与准备工作。（之前的执行流程可在本系列博客中看到）

容器refresh 总览：

     synchronized (this.startupShutdownMonitor) {// 设置环境，校验参数。prepareRefresh();// 创建BeanFactory（DefaultListableBeanFactor），加载bean定义信息。ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory();// 对BeanFactory设置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();}}

prepareBeanFactory

 protected void prepareBeanFactory(ConfigurableListableBeanFactory beanFactory) {// 设置类加载器beanFactory.setBeanClassLoader(getClassLoader());// 设置Spel解析器beanFactory.setBeanExpressionResolver(new StandardBeanExpressionResolver(beanFactory.getBeanClassLoader()));// 设置转换器，完成xml中字符到其他类型的转换beanFactory.addPropertyEditorRegistrar(new ResourceEditorRegistrar(this, getEnvironment()));// 设置一个beanPostProcessor 完成一系列 XXXAware接口的注入，就是在bean初始化前，从beanFactory中获取XXXAware进行诸如beanFactory.addBeanPostProcessor(new ApplicationContextAwareProcessor(this));// 设置哪些接口在依赖注入时忽略beanFactory.ignoreDependencyInterface(EnvironmentAware.class);beanFactory.ignoreDependencyInterface(EmbeddedValueResolverAware.class);beanFactory.ignoreDependencyInterface(ResourceLoaderAware.class);beanFactory.ignoreDependencyInterface(ApplicationEventPublisherAware.class);beanFactory.ignoreDependencyInterface(MessageSourceAware.class);beanFactory.ignoreDependencyInterface(ApplicationContextAware.class);// 有些类并不在BeanFactory中，注册添加这些类，这些类可以通过工厂获取，可以被依赖注入beanFactory.registerResolvableDependency(BeanFactory.class, beanFactory);beanFactory.registerResolvableDependency(ResourceLoader.class, this);beanFactory.registerResolvableDependency(ApplicationEventPublisher.class, this);beanFactory.registerResolvableDependency(ApplicationContext.class, this);// 设置一个beanPostProcessor，在bean初始化后，如果它是一个ApplicationListener 完成ApplicationListener的bean的注册beanFactory.addBeanPostProcessor(new ApplicationListenerDetector(this));// LoadTimeWeaver是一种代理技术，具体参考 https://www.cnblogs.com/wade-luffy/p/6073702.htmlif (beanFactory.containsBean(LOAD_TIME_WEAVER_BEAN_NAME)) {beanFactory.addBeanPostProcessor(new LoadTimeWeaverAwareProcessor(beanFactory));// Set a temporary ClassLoader for type matching.beanFactory.setTempClassLoader(new ContextTypeMatchClassLoader(beanFactory.getBeanClassLoader()));}// 如果beanFactory没有包含environment，systemProperties 等，注册添加一下。if (!beanFactory.containsLocalBean(ENVIRONMENT_BEAN_NAME)) {beanFactory.registerSingleton(ENVIRONMENT_BEAN_NAME, getEnvironment());}if (!beanFactory.containsLocalBean(SYSTEM_PROPERTIES_BEAN_NAME)) {beanFactory.registerSingleton(SYSTEM_PROPERTIES_BEAN_NAME, getEnvironment().getSystemProperties());}if (!beanFactory.containsLocalBean(SYSTEM_ENVIRONMENT_BEAN_NAME)) {beanFactory.registerSingleton(SYSTEM_ENVIRONMENT_BEAN_NAME, getEnvironment().getSystemEnvironment());}}

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Spring容器创建流程（3）对beanFactory设置

prepareBeanFactory

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