Spring(十)之自定义事件-白红宇

编写自定义事件的简单流程如下:

(1)编写CustomEvent.java

package com.tutorialspoint;import org.springframework.context.ApplicationEvent;public class CustomEvent extends ApplicationEvent{   public CustomEvent(Object source) {      super(source);   }   public String toString(){      return "My Custom Event";   }}

(2)编写CustomEventPublisher.java

package com.tutorialspoint;import org.springframework.context.ApplicationEventPublisher;import org.springframework.context.ApplicationEventPublisherAware;public class CustomEventPublisher implements ApplicationEventPublisherAware {   private ApplicationEventPublisher publisher;      public void setApplicationEventPublisher (ApplicationEventPublisher publisher) {      this.publisher = publisher;   }   public void publish() {      CustomEvent ce = new CustomEvent(this);      publisher.publishEvent(ce);   }}

(3)编写CustomEventHandler.java

package com.tutorialspoint;import org.springframework.context.ApplicationListener;public class CustomEventHandler implements ApplicationListener
     
       {   public void onApplicationEvent(CustomEvent event) {      System.out.println(event.toString());   }}

(4)编写MainApp.java

package com.tutorialspoint;import org.springframework.context.ConfigurableApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class MainApp {   public static void main(String[] args) {      ConfigurableApplicationContext context =          new ClassPathXmlApplicationContext("Beans.xml");            CustomEventPublisher cvp =          (CustomEventPublisher) context.getBean("customEventPublisher");            cvp.publish();        cvp.publish();   }}

(5)编写Beans.xml

(6)运行MainApp.java中的main方法