• Spring使用Application Event给bean之间的消息通讯提供了手段
• 应按照如下部分实现bean之间的消息通讯
  • 继承ApplicationEvent类实现自己的事件
  • 实现继承ApplicationListener接口实现监听事件
  • 使用ApplicationContext发布消息

示例中的通讯两个bean分别为DemoListener和Main

package com.wisely.event;import org.springframework.context.ApplicationEvent;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.wisely.event;import org.springframework.context.ApplicationListener;import org.springframework.stereotype.Component;@Componentpublic class DemoListener implements ApplicationListener
    
      {    public void onApplicationEvent(DemoEvent event) {            String msg = ((DemoEvent) event).getMsg();            System.out.println("我监听到了pulisher发布的message为:"+msg);    }}
    

package com.wisely.event;import org.springframework.context.annotation.AnnotationConfigApplicationContext;import org.springframework.stereotype.Component;@Componentpublic class Main {    public static void main(String[] args) {        AnnotationConfigApplicationContext context =                new AnnotationConfigApplicationContext("com.wisely.event");        Main main =context.getBean(Main.class);        main.pulish(context);        context.close();    }    public void pulish(AnnotationConfigApplicationContext context){        context.publishEvent(new DemoEvent(this, "22"));    }}

输出结果

我监听到了pulisher发布的message为:22