Extension of the {@link BeanFactory} interface to be implemented by bean factories
* that can enumerate all their bean instances, rather than attempting bean lookup
* by name one by one as requested by clients. BeanFactory implementations that
* preload all their bean definitions (such as XML-based factories) may implement
* this interface.
ListableBeanFactory的接口如下:

通过接口可以获取BeanDefinition,BeanNames,Bean Instance, Bean Annotations等相关信息。
本文详细解析了ListableBeanFactory接口,它是BeanFactory的扩展,用于实现能够枚举所有bean实例的工厂,而不仅仅是按需查找。适用于预加载所有bean定义的工厂,如XML基础的工厂。文章还介绍了如何通过该接口获取BeanDefinition,BeanNames,BeanInstance,BeanAnnotations等信息。
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