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记录一下后端开发过程中学到的知识

# 事件发送与监听

  1. 首先需要自定义事件类，如下所示:
    、、、

public class CustomEvent extends ApplicationEvent {
private String a;

public CustomEvent (Object source, String a){
    super (source);
    this.a = a;
}

public String getA (){
    return a;
}

}
、、、

  1. 之后编写用于推送事件的 Service

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    @Service
    public class EventPublisherService implements ApplicationEventPublisherAware{
       private ApplicationEventPublisher eventPublisher;

       @Override
       public void setApplicationEventPublisher (ApplicationEventpublisher applicaitonEventPublisher){
           this.eventPublisher = applicationEventPublisher;
       }

       public void publishPlayEvent (String a){
           CustomEvent customEvent = new CustomEvent (this, a);
           eventPublisher.publishEvent (customEvent);
       }
    }

  2. 最后编写监听器来实现操作:

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    @EventListener
    public void handleChannelEvent (CustomEvent customEvent){
       String a= customEvent.a;
       log.info (a);
    }

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