打造第一个Spring AOP的示例

俺是用Eclipse作的，看过之后做做看，体验一下AOP是什么东东阿！好，不多废话了，让我们开始吧.

第一步 建立一个接口

package com.neusoft.impl;

public interface IBusinessLogic {
public void foo () ;

}

第二步 建立接口的实现类

package com.neusoft.action;

import com.neusoft.impl.IBusinessLogic;

public class BusinessLogic implements IBusinessLogic {
public void foo() {
System.out.println("Inside BusinessLogic.foo()");
}
}

第三步 建立Before通知

package com.neusoft.action;

import java.lang.reflect.Method ;
import org.springframework.aop.MethodBeforeAdvice ;

public class TracingBeforeAdvice implements MethodBeforeAdvice {
public void before ( Method m, Object[] args, Object target ) throws Throwable {
System.out.println("Hello lisi!(by" + this.getClass().getName() + ")") ;

}
}

第四步 建立After通知

package com.neusoft.action;
import java.lang.reflect.Method;
import org.springframework.aop.AfterReturningAdvice ;
public class TracingAfterAdvice implements AfterReturningAdvice {
public void afterReturning ( Object object, Method m, Object[] args, Object target )
throws Throwable {
System.out.println ("Hello lisi!(by" + this.getClass().getName() + ")") ;
}
}

第五步 建立配置文件(springconfig.xml)

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<!-- Bean configuration -->
<bean id = "businesslogicbean"
class = "org.springframework.aop.framework.ProxyFactoryBean">
<property name = "proxyInterfaces">
<value>com.neusoft.impl.IBusinessLogic</value>

</property>
<property name="target">
<ref local = "beanTarget"/>
</property>
</bean>
<!-- Bean Classes -->
<bean id = "beanTarget"
class = "com.neusoft.action.BusinessLogic">
</bean>

<!-- Advice classes -->

<bean id = "theTracingBeforeAdvice"
class = "com.neusoft.action.TracingBeforeAdvice">
</bean>
<bean id = "theTracingAfterAdvice"
class = "com.neusoft.action.TracingAfterAdvice">
</bean>

<!-- Advisor pointcut definition for before advice -->

<bean id = "theTracingBeforeAdvisor"
class = "org.springframework.aop.support.RegexpMethodPointcutAdvisor">
<property name = "advice">
<ref local = "theTracingBeforeAdvice"/>
</property>
<property name="patterns">
<value>.*</value>
</property>
</bean>

<!-- Advisor pointcut definition for after advice -->

<bean id = "theTracingAfterAdvisor"
class = "org.springframework.aop.support.RegexpMethodPointcutAdvisor">
<property name = "advice">
<ref local = "theTracingAfterAdvice"/>
</property>
<property name = "patterns">
<value>.*</value>
</property>
</bean>
</beans>

第六步 建立测试类

package com.neusoft.test;

import org.springframework.context.ApplicationContext ;
import org.springframework.context.support.FileSystemXmlApplicationContext;

import com.neusoft.impl.IBusinessLogic;

public class MainApplication {

/**
* @author lishijin
*/
public static void main(String[] args) {

//Read the configration file
ApplicationContext ctx = new FileSystemXmlApplicationContext("/WEB-INF/springconfig.xml") ;
//Instantiate an object
IBusinessLogic testObject = (IBusinessLogic)ctx.getBean("businesslogicbean");
//Execute the public
//method of the bean
testObject.foo() ;
}

}

运行结果：
其中我没有做出详细的解释，我想你动手做之后，自然会知道是怎么回事，最近在研究AOP技术，敬请关注下我的博客