/**
- 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;
}
}
/**
- 事件监听器 */
@Component
//实现ApplicationListener接口，并指定监听的事件类型
public class DemoListener implements ApplicationListener{
//使用onApplicationEvent方法对消息进行接受处理
public void onApplicationEvent(DemoEvent event) {
String msg = event.getMsg();
System.out.println("我(bean-demoListener)接受到了bean-demoPublisger发布的消息：" + msg);
}
}
/**
- 事件发布类 */
@Component
public class DemoPublisher {
@Autowired
ApplicationContext applicationContext; //注入ApplicationContext用来发布事件
public void publish(String msg) {
//使用ApplicationContext的publishEvent方法来发布
applicationContext.publishEvent(new DemoEvent(this,msg));
}
}
/**
- 配置类 */
@Configuration
@Component("com.jiudao.event")
public class EventConfig {
}
/**
- 运行 */
public class Main {
public static void main(String[] args) {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(EventConfig.class);
DemoPublisher demoPublisher = context.getBean(DemoPublisher.class);
demoPublisher.publish("hello application event");
context.close();
}
}
运行提示：Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.jiudao.event.DemoPublisher] is defined
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:371)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:331)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:972)
at com.jiudao.event.Main.main(Main.java:14)
