使用DefaultAdvisorAutoProxyCreator实现spring

DefaultAdvisorAutoProxyCreator这个类功能更为强大，这个类的奇妙之处是他实现了BeanProcessor接口,当ApplicationContext读如所有的Bean配置信息后，这个类将扫描上下文，寻找所有的Advistor(一个Advisor是一个切入点和一个通知的组成)，将这些Advisor应用到所有符合切入点的Bean中

业务接口：

package StaticAdvisorTest;

public interface Shopping {

public String buySomething(String type);

public String buyAnything(String type);

public String sellSomething(String type);

public String sellAnything(String type);

}

业务实现类：

package AutoProxyTwo;

public class ShoppingImplA implements Shopping {

private Customer customer;

public Customer getCustomer() {

return customer;

}

public void setCustomer(Customer customer) {

this .customer = customer;

}

public String buySomething(String type) {

System.out.println( this .getCustomer().getName() + " bye " + type + " success " );

return null ;

}

public String buyAnything(String type) {

System.out.println( this .getCustomer().getName() + " bye " + type + " success " );

return null ;

}

public String sellAnything(String type) {

System.out.println( this .getCustomer().getName() + " sell " + type + " success " );

return null ;

}

public String sellSomething(String type) {

System.out.println( this .getCustomer().getName() + " sell " + type + " success " );

return null ;

}

package AutoProxyTwo;

public class ShoppingImplB implements Shopping {

private Customer customer;

public Customer getCustomer() {

return customer;

}

public void setCustomer(Customer customer) {

this .customer = customer;

}

public String buySomething(String type) {

System.out.println( this .getCustomer().getName() + " bye " + type + " success " );

return null ;

}

public String buyAnything(String type) {

System.out.println( this .getCustomer().getName() + " bye " + type + " success " );

return null ;

}

public String sellAnything(String type) {

System.out.println( this .getCustomer().getName() + " sell " + type + " success " );

return null ;

}

public String sellSomething(String type) {

System.out.println( this .getCustomer().getName() + " sell " + type + " success " );

return null ;

}

通知：

package AutoProxyTwo;

import java.lang.reflect.Method;

import org.springframework.aop.MethodBeforeAdvice;

// 前置通知

public class WelcomeAdvice implements MethodBeforeAdvice {

public void before(Method method, Object[] args, Object obj)

throws Throwable {

System.out.println( " Hello welcome to bye " );

}

配置文件：

我们配置一个advisor，方法和在我的blog关于静态切入点的用正则表达式配置切入点相同，这里匹配的是业务实现类中所有型如：***sell***的方法

buyBean和sellBean是最为普通的IOC配置

重点在autoProxyCreator中，我们只需配置一个id和class,spring会自动帮我们解析advisor,并将通知进行切入

<? xml version="1.0" encoding="UTF-8" ?>

<! DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd" >

< beans >

< bean id ="WelcomeAdvice" class ="AutoProxyTwo.WelcomeAdvice" >

</ bean >

< bean id ="autoProxyCreator" class ="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator" >

</ bean >

< bean id ="advisor" class ="org.springframework.aop.support.RegexpMethodPointcutAdvisor" >

< property name ="pattern" >

< value > .*sell.+ </ value >

</ property >

< property name ="advice" >

< ref bean ="WelcomeAdvice" />

</ property >

</ bean >

< bean id ="buyBean" class ="AutoProxyTwo.ShoppingImplA" >

< property name ="customer" >

< ref bean ="customer" />

</ property >

</ bean >

< bean id ="sellBean" class ="AutoProxyTwo.ShoppingImplB" >

< property name ="customer" >

< ref bean ="customer" />

</ property >

</ bean >

< bean id ="customer" class ="AutoProxyTwo.Customer" >

< constructor-arg index ="0" >

< value > gaoxiang </ value >

</ constructor-arg >

< constructor-arg index ="1" >

< value > 26 </ value >

</ constructor-arg >

</ bean >

</ beans >

测试程序：

需要注意的是，和BeanNameAutoProxyCreator相同，我们需要用ApplicationContext获得Bean

package AutoProxyTwo;

import java.io.File;

import org.springframework.beans.factory.BeanFactory;

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

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.FileSystemXmlApplicationContext;

import org.springframework.core.io.FileSystemResource;

public class TestAdvisor {

public static void main(String[] args) {

String filePath = System.getProperty( " user.dir " ) + File.separator + " AutoProxyTwo " + File.separator + " hello.xml " ;

BeanFactory factory = new XmlBeanFactory( new FileSystemResource(filePath));

ApplicationContext ctx = new FileSystemXmlApplicationContext(filePath);

Shopping shoppingA = null ;

Shopping shoppingB = null

使用DefaultAdvisorAutoProxyCreator实现spring的自动代理

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