SpringBoot_SpringApplication_自定义事件监听

1、创建springboot项目

2、自定义事件，继承 

SpringApplicationEvent 重写  CustomizingEvent

public class CustomizingEvent extends SpringApplicationEvent {

	public CustomizingEvent(SpringApplication application, String[] args) {
		super(application, args);
		System.out.println("............CustomizingEvent............");
		
	}

}

3、自定义监听器  实现

 ApplicationListener  中的  onApplicationEvent方法

public class CustomizingEventListener implements ApplicationListener<CustomizingEvent> {

	@Override
	public void onApplicationEvent(CustomizingEvent event) {
		System.out.println("........................CustomizingEventListener........................");
		
	}

}

4、模拟事件发生

@SpringBootApplication
public class EventsAndListenersApplication {
	public static void main(String[] args) {
		
		SpringApplication application = new SpringApplication(EventsAndListenersApplication.class);
		
		ApplicationStartingEventListener applicationStartingListenerCustomizing = new ApplicationStartingEventListener();
		//注册监听器
		application.addListeners(new CustomizingEventListener());
		
		
		ConfigurableApplicationContext context = application.run(args);
		//发布事件
		context.publishEvent(new CustomizingEvent(application, args));
       
	}
	
}

5、运行看结果