1. EventHanding in Spring

• Circle.java

package org.zcs.spring;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.annotation.Resource;
 

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ApplicationEventPublisherAware;
import org.springframework.context.MessageSource;
import org.springframework.stereotype.Component;
 
@Component
public class Circle implements Shape, ApplicationEventPublisherAware {
	@Autowired
	private MessageSource messageSource;
	public MessageSource getMessageSource() {
		return messageSource;
	}
	public void setMessageSource(MessageSource messageSource) {
		this.messageSource = messageSource;
	}
	private Point center;
	private ApplicationEventPublisher publisher;
	public Point getCenter() {
		return center;
	}
	 @Resource 
	public void setCenter(Point center) {
		this.center = center;
	}
	 @PostConstruct
	 public void initlize() {
		 System.out.println("initlizing a circle ");
	 }
	 @PreDestroy
	 public void destroy() {
		 System.out.println("destroy a circle");
	 }
	@Override
	public void draw() {
		// TODO Auto-generated method stub
		System.out.println("Drawing Circle:");
		System.out.println(messageSource.getMessage("drawing.circle", null, "Defalut Drawing circle", null));
		System.out.println(messageSource.getMessage("drawing.point", new Object[] {center.getX(), center.getY()}, "Defalut Drawing point", null));
		DrawEvent drawEvent = new DrawEvent(this); 
		publisher.publishEvent(drawEvent);
	}
	@Override
	public void setApplicationEventPublisher(ApplicationEventPublisher publisher) {
		// TODO Auto-generated method stub
		this.publisher = publisher;
	}
}

• DrawEvent.java

package org.zcs.spring;

import org.springframework.context.ApplicationEvent;

public class DrawEvent extends ApplicationEvent {

	public DrawEvent(Object source) {
		super(source);
		// TODO Auto-generated constructor stub
	}
	public String toString() {
		return "Draw Event occured";
	}
}

• MyEventListener.java

package org.zcs.spring;

import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.stereotype.Component;
@Component
public class MyEventListener implements ApplicationListener{

	@Override
	public void onApplicationEvent(ApplicationEvent event) {
		// TODO Auto-generated method stub
		System.out.println(event.toString());
	}
	
}

• DrawingApp.java

package org.zcs.spring;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
 

public class DrawingApp {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		//BeanFactory factory = new  FileSystemXmlApplicationContext("src/spring.xml");
		//Triangle triangle = new Triangle();
		 ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");
 
		Shape circle = (Shape)context.getBean("circle");
		circle.draw();
		System.out.println(context.getMessage("greeting", null, "Default Greeting", null));
	}
}

2.学习记录。

• 学习了spring中的监听操作。学习了一遍，有点儿懵逼哇。
• 先记录着，再看看…