【Spring】 (6）程序 发布消息 和监听消息

package com.example.demo_2_5;import org.springframework.context.ApplicationEvent;/** * Created by WangBin on 2017/4/17. *  自定义事件 */public class DemoEvent extends ApplicationEvent{    private static final long serialVersionUID=1L;    private String msg;    public DemoEvent(Object source,String msg) {        super(source);        this.msg=msg;    }    public String getMsg() {        return msg;    }    public void setMsg(String msg) {        this.msg = msg;    }}

package com.example.demo_2_5;import org.springframework.context.ApplicationListener;import org.springframework.stereotype.Component;/** * Created by WangBin on 2017/4/17. *  事件监听器 */@Component//把普通pojo实例化到spring容器中public class DemoListener implements ApplicationListener<DemoEvent>{//实现ApplicationListenner接口并制定监听的事件    @Override    public void onApplicationEvent(DemoEvent demoEvent) {//onApplicationEvent方法 对消息进行接收处理        String msg = demoEvent.getMsg();        System.err.println("接收到消息"+msg);    }}

package com.example.demo_2_5;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.ApplicationContext;import org.springframework.stereotype.Component;/** * Created by WangBin on 2017/4/17. * */@Componentpublic class DemoPublisher {    @Autowired    ApplicationContext applicationContext;//注入ApplicationContext 用来发布事件   【注意是context的包】    public void publish(String msg){        applicationContext.publishEvent(new DemoEvent(this,msg));//调用ApplicationContext的publishEvent方法来发布    }}

package com.example.demo_2_5;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;/** * Created by WangBin on 2017/4/17. * */@Configuration@ComponentScan("com.example.demo_2_5")public class EventConfig {}

package com.example.demo_2_5;import org.springframework.context.annotation.AnnotationConfigApplicationContext;/** * Created by WangBin on 2017/4/17. * */public class Main {    public static void main(String[] args) {        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(EventConfig.class);        DemoPublisher demoPublisher = context.getBean(DemoPublisher.class);        demoPublisher.publish("12111111111111111111111111111113");        context.close();    }}