ApplicationContext 自定义事件

(1)定义一个Animal类,在该类中定义一个speak方法,然后监视该方法

(2)定义一个AnimalSpeakEvent方法,该方法继承ApplicationEvent,重载其默认的构造方法.当用户调用Animal类中speak方法时触发该事件

(3)写一个监听类AnimalEventListener 实现ApplicationListener,并在配置文件中配置该监听器

public class AnimalSpeakEvent extends ApplicationEvent {

	private static final long serialVersionUID = 1L;
	private String animalName;
	public AnimalSpeakEvent(Object source) {
		super(source);
	}
	
	public AnimalSpeakEvent(Object source,String animalName) {
		super(source);
		this.animalName=animalName;
	}

	public String getAnimalName() {
		return animalName;
	}
}

 

public class AnimalEventListener implements ApplicationListener{

	@Override
	public void onApplicationEvent(ApplicationEvent event) {
		if(event instanceof AnimalSpeakEvent){
			AnimalSpeakEvent a=(AnimalSpeakEvent)event;
			System.out.println(this.getClass().getSimpleName()+"有一个动物在讲话,它的名字是"+a.getAnimalName());
		}
	}

}

 

public class Animal implements ApplicationContextAware{
	private ApplicationContext ac;
	private String name;
	private int age;
	@Override
	public void setApplicationContext(ApplicationContext context)
			throws BeansException {
		this.ac=context;
	}
	public String speak(){
		ac.publishEvent(new AnimalSpeakEvent(this, this.name));
		return ("我的名字是:"+this.name+",我的年龄是:"+this.age);
	}
	public ApplicationContext getAc() {
		return ac;
	}
	public void setAc(ApplicationContext ac) {
		this.ac = ac;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	
	
}

 

public class Test3 {
	public static void main(String[] args) {
		ApplicationContext context=new ClassPathXmlApplicationContext("config/applicationContext.xml");
		Animal animal=(Animal)context.getBean("animal");
		System.out.println(animal.speak());
	}
}