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Spring通過介面代理能提高程式程式碼的靈活性，介面代理的四個步驟：

• 配置被代理的目標類
• 配置通知
• 配置通知的作用切入點
• 配置介面的代理物件(Spring預設為介面代理)

配置：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
				http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
				http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

<!-- 配置目標物件 targetObject -->
<bean id="targetObject" class="com.zhiwei.target.TargetObject">
	<property name="name" value="name"/>
</bean>

<!-- 配置通知 -->
<bean id="myAdvice" class="com.zhiwei.advice.MyAdvice"/>

<!-- 
配置通知的切入點：
NameMatchMethodPointcutAdvisor:按照名稱匹配切入點(RegexpMethodPointcutAdvisor可以使用正則式匹配)
mappedNames:通知作用的切入點:支援ant格式的表達：sys*
注意：一個通知匹配一個切入點通知器
 -->
 <bean id="beforAdvicePacket" class="org.springframework.aop.support.NameMatchMethodPointcutAdvisor">
 <property name="advice" ref="myAdvice"/>
 <property name="mappedNames">
	 <list>
	 	<value>sayHello</value>
	 </list>
 </property>
 </bean>

<!-- 配置代理物件：
  proxyInterfaces:代理介面集：目標物件實現的介面
  target:被代理目標物件
  interceptorNames:攔截器名稱集合
  proxyTargetClass：是否開啟類代理
   -->
<bean id="proxyObject" class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces"> <!-- 被代理介面 -->
	<list>
		<value>com.zhiwei.target.TargetInter</value>
		<value>com.zhiwei.target.TargetInter01</value>
	</list>
</property>
<property name="target" ref="targetObject"/>  <!-- 目標物件 -->
<property name="interceptorNames"> <!-- 目標物件注入的通知 -->
	<list>
		<value>beforAdvicePacket</value>
	</list>
</property>
<property name="proxyTargetClass" value="true"/>
</bean>
</beans>
 

目標物件：

package com.zhiwei.target;
public class TargetObject implements TargetInter ,TargetInter01{
    
	private String name;
	
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	@Override
	public void sayHello() {

		System.out.println("Hello "+name);
	}

	@Override
	public void sayBye() {
		System.out.println("Bye "+name);
	}

}

 

目標物件實現介面：

package com.zhiwei.target;

public interface TargetInter01 {
  public void sayBye();
}

package com.zhiwei.target;

public interface TargetInter {
	
	public void sayHello();
}

測試類：

package com.zhiwei.target;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.zhiwei.target.TargetInter;
import com.zhiwei.target.TargetInter01;
import com.zhiwei.target.TargetObject;


public class TestAOP {

	public static void main(String[] args) {
		
		ApplicationContext ac=new ClassPathXmlApplicationContext("com/zhiwei/target/applicationContext.xml");
		
		//使用IOC容器裡裡面的代理物件，預設介面代理
		TargetInter ti=(TargetInter) ac.getBean("proxyObject");
		System.out.println("預設介面代理");
		ti.sayHello();
	
		//因為是介面代理，介面指向同一個目標物件：	TargetInter01 ti01=(TargetInter01) ac.getBean("proxyObject");
		TargetInter01 ti01=(TargetInter01) ti;
		ti01.sayBye();
		
		//IOC配置開啟類代理
		TargetObject to=(TargetObject) ac.getBean("proxyObject");
		System.out.println("\n\nIOC配置為類代理");
		to.sayHello();
		to.sayBye();
	}
}

 

結果：

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