下面我們重點檢視這個方法：

protected void invokeBeanFactoryPostProcessors(ConfigurableListableBeanFactory beanFactory)

		// Invoke BeanDefinitionRegistryPostProcessors first, if any.
		Set<String> processedBeans = new HashSet<String>();
		if (beanFactory instanceof BeanDefinitionRegistry) {
			BeanDefinitionRegistry registry = (BeanDefinitionRegistry) beanFactory;
			List<BeanFactoryPostProcessor> regularPostProcessors = new LinkedList<BeanFactoryPostProcessor>();
			List<BeanDefinitionRegistryPostProcessor> registryPostProcessors =
					new LinkedList<BeanDefinitionRegistryPostProcessor>();
			for (BeanFactoryPostProcessor postProcessor : getBeanFactoryPostProcessors()) {
				if (postProcessor instanceof BeanDefinitionRegistryPostProcessor) {
					BeanDefinitionRegistryPostProcessor registryPostProcessor =
							(BeanDefinitionRegistryPostProcessor) postProcessor;
					registryPostProcessor.postProcessBeanDefinitionRegistry(registry);
					registryPostProcessors.add(registryPostProcessor);
				}
				else {
					regularPostProcessors.add(postProcessor);
				}
			}
			Map<String, BeanDefinitionRegistryPostProcessor> beanMap =
					beanFactory.getBeansOfType(BeanDefinitionRegistryPostProcessor.class, true, false);
			List<BeanDefinitionRegistryPostProcessor> registryPostProcessorBeans =
					new ArrayList<BeanDefinitionRegistryPostProcessor>(beanMap.values());
			OrderComparator.sort(registryPostProcessorBeans);
			for (BeanDefinitionRegistryPostProcessor postProcessor : registryPostProcessorBeans) {
				postProcessor.postProcessBeanDefinitionRegistry(registry);
			}
			invokeBeanFactoryPostProcessors(registryPostProcessors, beanFactory);
			invokeBeanFactoryPostProcessors(registryPostProcessorBeans, beanFactory);
			invokeBeanFactoryPostProcessors(regularPostProcessors, beanFactory);
			processedBeans.addAll(beanMap.keySet());
		}
		else {
			// Invoke factory processors registered with the context instance.
			invokeBeanFactoryPostProcessors(getBeanFactoryPostProcessors(), beanFactory);
		}
 

上塑造型，把beanFactory上溯到BeanDefinitionRegistry介面，第5行程式碼建立一個LinkedList集合，裡面存放BeanFactoryPostProcessor物件。第6行程式碼

建立一個LinkList集合，registryPostProcessors用來存放一些用來對bean定義的註冊資訊進行處理的PostProcessor。

第8行迴圈對普通的PostProcessor進行迴圈；第9行程式碼判斷postProcessor是否為對bean定義的註冊資訊進行處理的PostProcessor，

如果是的話，對其進行相應的業務處理，否則處理普通的postProcessor.

程式碼二：

Map<String, BeanDefinitionRegistryPostProcessor> beanMap =
					beanFactory.getBeansOfType(BeanDefinitionRegistryPostProcessor.class, true, false);
			List<BeanDefinitionRegistryPostProcessor> registryPostProcessorBeans =
					new ArrayList<BeanDefinitionRegistryPostProcessor>(beanMap.values());
			OrderComparator.sort(registryPostProcessorBeans);
			for (BeanDefinitionRegistryPostProcessor postProcessor : registryPostProcessorBeans) {
				postProcessor.postProcessBeanDefinitionRegistry(registry);
			}
			invokeBeanFactoryPostProcessors(registryPostProcessors, beanFactory);
			invokeBeanFactoryPostProcessors(registryPostProcessorBeans, beanFactory);
			invokeBeanFactoryPostProcessors(regularPostProcessors, beanFactory);
			processedBeans.addAll(beanMap.keySet());
 

第5行呼叫排序方法對registryPostProcessorBeans進行排序，第6-8行呼叫registryPostProcessorBeans，

第9-12行，呼叫invokeBeanFactoryPostPrcessors方法，就是為每個PostProcessor，進行postProcessor.postProcessBeanFactory()方法呼叫。

13行，processedBeans存放所有BeanDefinitionRegistryPostProcessor型別的物件。

程式碼三：

// Do not initialize FactoryBeans here: We need to leave all regular beans
		// uninitialized to let the bean factory post-processors apply to them!
		String[] postProcessorNames =
				beanFactory.getBeanNamesForType(BeanFactoryPostProcessor.class, true, false);

		// Separate between BeanFactoryPostProcessors that implement PriorityOrdered,
		// Ordered, and the rest.
		List<BeanFactoryPostProcessor> priorityOrderedPostProcessors = new ArrayList<BeanFactoryPostProcessor>();
		List<String> orderedPostProcessorNames = new ArrayList<String>();
		List<String> nonOrderedPostProcessorNames = new ArrayList<String>();
		for (String ppName : postProcessorNames) {
			if (processedBeans.contains(ppName)) {
				// skip - already processed in first phase above
			}
			else if (isTypeMatch(ppName, PriorityOrdered.class)) {
				priorityOrderedPostProcessors.add(beanFactory.getBean(ppName, BeanFactoryPostProcessor.class));
			}
			else if (isTypeMatch(ppName, Ordered.class)) {
				orderedPostProcessorNames.add(ppName);
			}
			else {
				nonOrderedPostProcessorNames.add(ppName);
			}
		}

		// First, invoke the BeanFactoryPostProcessors that implement PriorityOrdered.
		OrderComparator.sort(priorityOrderedPostProcessors);
		invokeBeanFactoryPostProcessors(priorityOrderedPostProcessors, beanFactory);

		// Next, invoke the BeanFactoryPostProcessors that implement Ordered.
		List<BeanFactoryPostProcessor> orderedPostProcessors = new ArrayList<BeanFactoryPostProcessor>();
		for (String postProcessorName : orderedPostProcessorNames) {
			orderedPostProcessors.add(getBean(postProcessorName, BeanFactoryPostProcessor.class));
		}
		OrderComparator.sort(orderedPostProcessors);
		invokeBeanFactoryPostProcessors(orderedPostProcessors, beanFactory);

		// Finally, invoke all other BeanFactoryPostProcessors.
		List<BeanFactoryPostProcessor> nonOrderedPostProcessors = new ArrayList<BeanFactoryPostProcessor>();
		for (String postProcessorName : nonOrderedPostProcessorNames) {
			nonOrderedPostProcessors.add(getBean(postProcessorName, BeanFactoryPostProcessor.class));
		}
		invokeBeanFactoryPostProcessors(nonOrderedPostProcessors, beanFactory);