Spring事务处理及其AOP框架的内幕 （3）

以上就是配置文件,现在我们假设使用业务对象如下,这里是一个简单测试类:

//$ID:MainApp.java Created:2005-11-6 by Kerluse Benn

package com.osiris.springaop;

import java.util.Date;

import org.springframework.beans.factory.BeanFactory;

import org.springframework.beans.factory.xml.XmlBeanFactory;

import org.springframework.core.io.FileSystemResource;

import com.osiris.springaop.advices.intruduction.IAuditable;

public class MainApp {

/**

* @param args

* @author Kerluse Benn

*/

public static void main(String[] args) throws Exception{

字串5

// TODO Add your codes here

BeanFactory factory=new XmlBeanFactory(new FileSystemResource("bean.xml"));

BookService bookService=(BookService)factory.getBean("BookService");

IAuditable auditable=(IAuditable)bookService;

System.out.print(bookService.OrderBook("Kerluse Benn","Professional C#"));

auditable.setLastModifiedDate(new Date());

System.out.println(" 订购时间为"+auditable.getLastModifiedDate());

Thread.sleep(10000);

System.out.print(bookService.OrderBook("Kerluse Benn","Expert j2ee one-on-one"));

auditable.setLastModifiedDate(new Date());

System.out.println(" 订购时间为"+auditable.getLastModifiedDate());
字串3
}

}

输出结果:

订购Professional C#成功 订购时间为Mon Nov 07 11:35:20 CST 2005

订购Expert j2ee one-on-one成功 订购时间为Mon Nov 07 11:35:30 CST 2005

看见上面黑体字:

IAuditable auditable=(IAuditable)bookService;

由于bookService对象事实上已经实现了IAuditable接口,通过Spring AOP的introduction切入实现,所以在运行时(熟悉C++的vtable模型的可以在大脑里想一下)可以转换,我们就可以随意添加自己的接口方法了.