springspringspringIOCbeanbeanBeanDefinitionBeanDefinitionBeanDefinition

springbeanMapcontext.getBean****.classkeyMap

beanBeanDifinitionbean
BeanDifinitionBeanDifinitionPlaceholderConfigurerSupportBeanFactoryPostProcessor

PlaceholderConfigurerSupport Abstract base class for property resource configurers that resolve placeholders in bean definition property values.

doProcessConfigurationClassConfigurationClassPostProcessor


https://blog.csdn.net/a745233700/article/details/80959716
https://www.jianshu.com/p/934f4f996421
https://www.cnblogs.com/yanggb/p/11004887.html


https://www.jianshu.com/p/0aa393c92d87


4. BeanFactoryApplicationContextBeanFactoryFactoryBean