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Aware标志着bean的对象可通过回调方法被spring容器通知。（感知器/通知机）

1. 扫描出来的类存到了哪里？
   

将bean扫出来然后遍历存到了DefaultListableBeanFactory里面。然后取bean的时候从里面把他按照名字取出来

@Override	public void registerBeanDefinition(String beanName, BeanDefinition beanDefinition)			throws BeanDefinitionStoreException {
   		Assert.hasText(beanName, "Bean name must not be empty");		Assert.notNull(beanDefinition, "BeanDefinition must not be null");		if (beanDefinition instanceof AbstractBeanDefinition) {
   			try {
   				((AbstractBeanDefinition) beanDefinition).validate();			}			catch (BeanDefinitionValidationException ex) {
   				throw new BeanDefinitionStoreException(beanDefinition.getResourceDescription(), beanName,						"Validation of bean definition failed", ex);			}		}		BeanDefinition existingDefinition = this.beanDefinitionMap.get(beanName);		if (existingDefinition != null) {
   			if (!isAllowBeanDefinitionOverriding()) {
   				throw new BeanDefinitionStoreException(beanDefinition.getResourceDescription(), beanName,						"Cannot register bean definition [" + beanDefinition + "] for bean '" + beanName +						"': There is already [" + existingDefinition + "] bound.");			}			else if (existingDefinition.getRole() < beanDefinition.getRole()) {
   				// e.g. was ROLE_APPLICATION, now overriding with ROLE_SUPPORT or ROLE_INFRASTRUCTURE				if (logger.isWarnEnabled()) {
   					logger.warn("Overriding user-defined bean definition for bean '" + beanName +							"' with a framework-generated bean definition: replacing [" +							existingDefinition + "] with [" + beanDefinition + "]");				}			}			else if (!beanDefinition.equals(existingDefinition)) {
   				if (logger.isInfoEnabled()) {
   					logger.info("Overriding bean definition for bean '" + beanName +							"' with a different definition: replacing [" + existingDefinition +							"] with [" + beanDefinition + "]");				}			}			else {
   				if (logger.isDebugEnabled()) {
   					logger.debug("Overriding bean definition for bean '" + beanName +							"' with an equivalent definition: replacing [" + existingDefinition +							"] with [" + beanDefinition + "]");				}			}			//-----------------------------------------			重点######################################			//-----------------------------------------			重点######################################			//-----------------------------------------			重点######################################			//-----------------------------------------			重点######################################			//-----------------------------------------			重点######################################			this.beanDefinitionMap.put(beanName, beanDefinition);		}		else {
   			if (hasBeanCreationStarted()) {
   				// Cannot modify startup-time collection elements anymore (for stable iteration)				synchronized (this.beanDefinitionMap) {
   					this.beanDefinitionMap.put(beanName, beanDefinition);					List
   
     updatedDefinitions = new ArrayList<>(this.beanDefinitionNames.size() + 1);					updatedDefinitions.addAll(this.beanDefinitionNames);					updatedDefinitions.add(beanName);					this.beanDefinitionNames = updatedDefinitions;					if (this.manualSingletonNames.contains(beanName)) {
   						Set
    
      updatedSingletons = new LinkedHashSet<>(this.manualSingletonNames);						updatedSingletons.remove(beanName);						this.manualSingletonNames = updatedSingletons;					}				}			}			else {
   				// Still in startup registration phase				this.beanDefinitionMap.put(beanName, beanDefinition);				this.beanDefinitionNames.add(beanName);				this.manualSingletonNames.remove(beanName);			}			this.frozenBeanDefinitionNames = null;		}		if (existingDefinition != null || containsSingleton(beanName)) {
   			resetBeanDefinition(beanName);		}	}
    
   

调试过程

再次调试的启动过程

doGetBean调用了构造方法和set方法

终于捕捉 到了，最终new 一个bean的时机原来在这里

真正的地方

找到了

instanceWrapper = createBeanInstance(beanName, mbd, args);

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