beanfactory and applicationcontext

BeanFactory -> HierarchicalBeanFactory -> ConfigurableBeanFactory is the main BeanFactory design route.

• BeanFactory: Basic rules like getBean() function
• HierarchicalBeanFactory: Manage family IoC container like getParentBeanFactory() function
• ConfigurableBeanFactory: config of BeanFactory like using setParentBeanFactory() to set family IoC container

BeanFactory -> ListableBeanFactory and HierarchicalBeanFactory -> ApplicationContext -> ConfigurableApplicationContext is the main ApplicationContext design route。

ListableBeanFactory: Let function of BeanFactory be more usefull like getBeanDefinitionNames()
ApplicationContext: Implements MessageSource, ResourceLoader and ApplicationEventPublisher interface to add more functions