spring 扩展点

一.初始化

• @PostConstruct

•  org.springframework.beans.factory.InitializingBean 接口

    void afterPropertiesSet()

•   init-method 属性

二.注销

•   @PreDestroy
• org.springframework.beans.factory.DisposableBean 接口

    void destroy() throws Exception;

•  destroy-method属性

三.容器启动和关闭（Startup and shutdown callbacks ）

    publicinterface Lifecycle {

    void start();

    void stop();

    boolean isRunning();

}

    （附：正确关闭非web的spring容器：        AbstractApplicationContext.registerShutdownHook()）

四. 感知容器

public interface ApplicationContextAware {

    void setApplicationContext(ApplicationContext applicationContext) throws BeansException;

}

 

  public interface ApplicationContextAware}   
 void setApplicationContext(ApplicationContext applicationContext) throws BeansException;
}

  ServletConfigAware

  ServletContextAware

messagesourceAware可感知国际化信息

五. 容器扩展点

• org.springframework.beans.factory.config.BeanPostProcessor 

When such a class is registered as a post-processor with the container, for each bean instance that is created by the container, the post-processor gets a callback from the container both before container initialization methods (such as InitializingBean’s afterPropertiesSet() and any declared init method) are called as well as after any bean initialization callbacks

•  org.springframework.beans.factory.config.BeanFactoryPostProcessor

BeanFactoryPostProcessor operates on the bean configuration metadata; that is, the Spring IoC container allows a BeanFactoryPostProcessor to read the configuration metadata and potentially change it before the container instantiates any beans other than BeanFactoryPostProcessors.

   -------》PropertyPlaceholderConfigurer,PropertyOverrideConfigurer