回到org.springframework.context.support.AbstractApplicationContext的refresh方法
//org.springframework.context.support.AbstractApplicationContext 1 @Override 2 public void refresh() throws BeansException, IllegalStateException { 3 synchronized (this.startupShutdownMonitor) { 4 // Prepare this context for refreshing. 5 prepareRefresh(); 6 7 // Tell the subclass to refresh the internal bean factory. 8 ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory(); 9 10 // Prepare the bean factory for use in this context.11 prepareBeanFactory(beanFactory);12 13 try {14 // Allows post-processing of the bean factory in context subclasses.15 postProcessBeanFactory(beanFactory);16 17 // Invoke factory processors registered as beans in the context.18 invokeBeanFactoryPostProcessors(beanFactory);19 20 // Register bean processors that intercept bean creation.21 registerBeanPostProcessors(beanFactory);22 23 // Initialize message source for this context.24 initMessageSource();25 26 // Initialize event multicaster for this context.27 initApplicationEventMulticaster();28 29 // Initialize other special beans in specific context subclasses.30 onRefresh();31 32 // Check for listener beans and register them.33 registerListeners();34 35 // Instantiate all remaining (non-lazy-init) singletons.36 finishBeanFactoryInitialization(beanFactory);37 38 // Last step: publish corresponding event.39 finishRefresh();40 }41 42 catch (BeansException ex) {43 // Destroy already created singletons to avoid dangling resources.44 destroyBeans();45 46 // Reset 'active' flag.47 cancelRefresh(ex);48 49 // Propagate exception to caller.50 throw ex;51 }52 }53 } 第36行，创建bean实例（非延迟加载、单例）。跟踪方法会调用org.springframework.beans.factory.support.AbstractBeanFactory的getBean（String beanName）方法，接着跟踪到AbstractBeanFactory的getBean的doGetBean
//org.springframework.beans.factory.support.AbstractBeanFactory 1 /** 2 * Return an instance, which may be shared or independent, of the specified bean. 3 * @param name the name of the bean to retrieve 4 * @param requiredType the required type of the bean to retrieve 5 * @param args arguments to use if creating a prototype using explicit arguments to a 6 * static factory method. It is invalid to use a non-null args value in any other case. 7 * @param typeCheckOnly whether the instance is obtained for a type check, 8 * not for actual use 9 * @return an instance of the bean 10 * @throws BeansException if the bean could not be created 11 */ 12 @SuppressWarnings("unchecked") 13 protected T doGetBean( 14 final String name, final Class requiredType, final Object[] args, boolean typeCheckOnly) 15 throws BeansException { 16 17 final String beanName = transformedBeanName(name); 18 Object bean; 19 20 // Eagerly check singleton cache for manually registered singletons. 21 Object sharedInstance = getSingleton(beanName); 22 if (sharedInstance != null && args == null) { 23 if (logger.isDebugEnabled()) { 24 if (isSingletonCurrentlyInCreation(beanName)) { 25 logger.debug("Returning eagerly cached instance of singleton bean '" + beanName + 26 "' that is not fully initialized yet - a consequence of a circular reference"); 27 } 28 else { 29 logger.debug("Returning cached instance of singleton bean '" + beanName + "'"); 30 } 31 } 32 bean = getObjectForBeanInstance(sharedInstance, name, beanName, null); 33 } 34 35 else { 36 // Fail if we're already creating this bean instance: 37 // We're assumably within a circular reference. 38 if (isPrototypeCurrentlyInCreation(beanName)) { 39 throw new BeanCurrentlyInCreationException(beanName); 40 } 41 42 // Check if bean definition exists in this factory. 43 BeanFactory parentBeanFactory = getParentBeanFactory(); 44 if (parentBeanFactory != null && !containsBeanDefinition(beanName)) { 45 // Not found -> check parent. 46 String nameToLookup = originalBeanName(name); 47 if (args != null) { 48 // Delegation to parent with explicit args. 49 return (T) parentBeanFactory.getBean(nameToLookup, args); 50 } 51 else { 52 // No args -> delegate to standard getBean method. 53 return parentBeanFactory.getBean(nameToLookup, requiredType); 54 } 55 } 56 57 if (!typeCheckOnly) { 58 markBeanAsCreated(beanName); 59 } 60 61 try { 62 final RootBeanDefinition mbd = getMergedLocalBeanDefinition(beanName); 63 checkMergedBeanDefinition(mbd, beanName, args); 64 65 // Guarantee initialization of beans that the current bean depends on. 66 String[] dependsOn = mbd.getDependsOn(); 67 if (dependsOn != null) { 68 for (String dependsOnBean : dependsOn) { 69 if (isDependent(beanName, dependsOnBean)) { 70 throw new BeanCreationException("Circular depends-on relationship between '" + 71 beanName + "' and '" + dependsOnBean + "'"); 72 } 73 registerDependentBean(dependsOnBean, beanName); 74 getBean(dependsOnBean); 75 } 76 } 77 78 // Create bean instance. 79 if (mbd.isSingleton()) { 80 sharedInstance = getSingleton(beanName, new ObjectFactory 关注第79-96行，创建了bean实例（单例的），具体细节不再介绍，请大家有兴趣的可以研究。
下一章介绍Spring解析自定义xsd, 不是命名空间为http://www.springframework.org/schema/beans的节点。
为了大家更直观地查看创建bean过程，列出bean创建的栈信息