SpringBoot事件监听

代码演示：

package com.boot.event.eventdemo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;

@SpringBootApplication
public class EventDemoApplication {

    public static void main(String[] args) {
        SpringApplication app = new SpringApplication(EventDemoApplication.class);
        //第一种方式 添加监听事件
        // app.addListeners(new MyApplicationListener());
        ConfigurableApplicationContext context = app.run(args);
        // 发布事件
        context.publishEvent(new MyApplicationEvent(new Object()));

        context.close();
    }
}

package com.boot.event.eventdemo;

import org.springframework.context.event.ContextClosedEvent;
import org.springframework.context.event.EventListener;
import org.springframework.stereotype.Component;

@Component
public class HandlerEvent {
//第四种方式，最常用方式    
    @EventListener(MyApplicationEvent.class)
    public void handlerEvent(MyApplicationEvent event) {
        System.out.println("接受到了事件====:"+event.getClass());
        System.out.println("接受到了事件====:"+event.getSource());
    }

    @EventListener(ContextClosedEvent.class)
    public void handlerEvent1(Object event) {
        System.out.println("接受到了事件:"+event.getClass());
    }
}

package com.boot.event.eventdemo;

import org.springframework.context.ApplicationEvent;

public class MyApplicationEvent extends ApplicationEvent {
    public MyApplicationEvent(Object source) {
        super(source);
    }
}

package com.boot.event.eventdemo;

import org.springframework.context.ApplicationListener;

//第二种方式 @Component
public class MyApplicationListener implements ApplicationListener<MyApplicationEvent> {

    @Override
    public void onApplicationEvent(MyApplicationEvent event) {
        System.out.println("接受到了事件:"+event.getClass());
        System.out.println("接受到了事件:"+event.getSource());
    }
}

application.properties

#第三种方式 
context.listener.classes=com.boot.event.eventdemo.MyApplicationListener

使用第四种方式配置监听器的打印结果：