事件监听

事件类型     java.util.EventObject
事件监听器   java.util.EventListener

Spring容器事件监听机制

事件类型
org.springframework.context.AppliationEvent
监听器
org.springframework.context.ApplicationListener 


public interface ApplicationListener<E extends ApplicationEvent> extends EventListener {
    void onApplicationEvent(E event);
}



Spring 内置事件

ContextRefreshedEvent  
ContextStartedEvent  
ContextStoppedEvent
ContextClosedEvent
RequestHandledEvent      


@Component
public class MyApplicationListener implements ApplicationListener< ApplicationEvent>{
    @Override
    public void onApplicationEvent(ApplicationEvent event){       
        System.out.println("onApplicationEvent,"+event+","+Thread.currentThread());
    }
}

ApplicationContext容器 发布事件
AbstractApplicationContext.publishEvent(ApplicationEvent event)

SimpleApplicationEventMulticaster

@EventListener

自定义事件实例
https://gitee.com/dyyx/springboothello/tree/master/src/main/java/demo/event