Spring 感知接口顺序

Question

假设一个 bean 实现了 https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/beans/factory/Aware.html

中的所有 Aware 接口

这些接口在生命周期中是否总是以特定顺序被调用？

我说的接口是：ApplicationContextAware、ApplicationEventPublisherAware、BeanClassLoaderAware、BeanFactoryAware、BeanNameAware、BootstrapContextAware、EmbeddedValueResolverAware、EnvironmentAware、ImportAware、LoadTimeWeaverAware、MessageSourceAware、NotificationPublisherAware、ResourceLoaderAware、SchedulerContextAware、ServletConfigAware 和 ServletContext=ware。[=12=12 ]

Answer 1

参见the docs for BeanFactory and the ApplicationContextAwareProcessor：

Bean factory implementations should support the standard bean lifecycle interfaces as far as possible. The full set of initialization methods and their standard order is:

• BeanNameAware's setBeanName
• BeanClassLoaderAware's setBeanClassLoader
• BeanFactoryAware's setBeanFactory
• EnvironmentAware's setEnvironment
• EmbeddedValueResolverAware's setEmbeddedValueResolver
• ResourceLoaderAware's setResourceLoader (only applicable when running in an application context)
• ApplicationEventPublisherAware's setApplicationEventPublisher (only applicable when running in an application context)
• MessageSourceAware's setMessageSource (only applicable when running in an application context)
• ApplicationContextAware's setApplicationContext (only applicable when running in an application context)
• ServletContextAware's setServletContext (only applicable when running in a web application context)
• postProcessBeforeInitialization methods of BeanPostProcessors
• InitializingBean's afterPropertiesSet
• a custom init-method definition
• postProcessAfterInitialization methods of BeanPostProcessors

您会注意到这不是完整列表。一些（即 ImportAware）根据其父配置上下文的导入方式获得 dynamically added to the list of PostProcessors。在这种情况下，您可以假设它们位于列表的末尾，如果您需要更多细节，可以在调试器中跟踪它们。