Differences between beanfactory and factorybean

Both of them are factories , but FactoryBean It's still essentially one Bean, Also return BeanFactory management

BeanFactory yes Spring The top interface of the container ,FactoryBean More similar to user-defined factory interface .

BeanFactory： With Factory ending , Indicates that it is a factory class ( Interface ),  It is responsible for production and management bean A factory of . stay Spring in ,BeanFactory yes IOC The core interface of the container , Its duties include ： Instantiation 、 location 、 Configuring objects in an application and establishing dependencies between them .BeanFactory It's just an interface , Not at all IOC The concrete implementation of the container , however Spring Containers offer many implementations , Such as  DefaultListableBeanFactory、XmlBeanFactory、ApplicationContext etc. , among XmlBeanFactory It's a commonly used one , The implementation will use XML Method describes the objects that make up the application and the dependencies among them .XmlBeanFactory Class will hold this XML Configuration metadata , And use it to build a fully configurable system or application . 
   FactoryBean： It's a Bean. stay Spring in , be-all Bean It's all by BeanFactory( That is to say IOC Containers ) To manage . But yes FactoryBean for , This Bean It's not simple Bean, It's a factory that can produce or decorate object generation Bean, Its implementation is similar to the factory pattern and decorator pattern in the design pattern