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Spring(十)之自定义事件

日期：2018-08-10点击：497收藏

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<CustomEvent> { 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

<?xml version = "1.0" encoding = "UTF-8"?> <beans xmlns = "http://www.springframework.org/schema/beans" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation = "http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"> <bean id = "customEventHandler" class = "com.tutorialspoint.CustomEventHandler"/> <bean id = "customEventPublisher" class = "com.tutorialspoint.CustomEventPublisher"/> </beans>

(6)运行MainApp.java中的main方法