使用DefaultAdvisorAutoProxyCreator实现spring的自动代理

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 {
publicStringbuySomething(Stringtype);
publicStringbuyAnything(Stringtype);
publicStringsellSomething(Stringtype);
publicStringsellAnything(Stringtype);

}

业务实现类：

package AutoProxyTwo;

public class ShoppingImplA implements Shopping {
privateCustomercustomer;
publicCustomergetCustomer(){
returncustomer;
}
publicvoidsetCustomer(Customercustomer){
this.customer=customer;
}
publicStringbuySomething(Stringtype){
System.out.println(this.getCustomer().getName()+"bye"+type+"success");
returnnull;
}

publicStringbuyAnything(Stringtype){
System.out.println(this.getCustomer().getName()+"bye"+type+"success");
returnnull;

}
publicStringsellAnything(Stringtype){
System.out.println(this.getCustomer().getName()+"sell"+type+"success");
returnnull;
}
publicStringsellSomething(Stringtype){
System.out.println(this.getCustomer().getName()+"sell"+type+"success");
returnnull;
}

}


package AutoProxyTwo;

public class ShoppingImplB implements Shopping {
privateCustomercustomer;
publicCustomergetCustomer(){
returncustomer;
}
publicvoidsetCustomer(Customercustomer){
this.customer=customer;
}
publicStringbuySomething(Stringtype){
System.out.println(this.getCustomer().getName()+"bye"+type+"success");
returnnull;
}

publicStringbuyAnything(Stringtype){
System.out.println(this.getCustomer().getName()+"bye"+type+"success");
returnnull;

}
publicStringsellAnything(Stringtype){
System.out.println(this.getCustomer().getName()+"sell"+type+"success");
returnnull;
}
publicStringsellSomething(Stringtype){
System.out.println(this.getCustomer().getName()+"sell"+type+"success");
returnnull;
}

}

通知：

package AutoProxyTwo;

import java.lang.reflect.Method;

import org.springframework.aop.MethodBeforeAdvice;
// 前置通知
public class WelcomeAdvice implements MethodBeforeAdvice {

publicvoidbefore(Methodmethod,Object[]args,Objectobj)
throwsThrowable{

System.out.println("Hellowelcometobye");

}

}

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

<? xmlversion="1.0"encoding="UTF-8" ?>
<! DOCTYPEbeansPUBLIC"-//SPRING//DTDBEAN//EN""http://www.springframework.org/dtd/spring-beans.dtd" >
< beans >
< bean id ="WelcomeAdvice" class ="AutoProxyTwo.WelcomeAdvice" >
</ bean >

<!-- 自动代理所有的advisor -->
< 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 > <!-- 业务实现方法名匹配 -->
</ 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 {

publicstaticvoidmain(String[]args){

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

BeanFactoryfactory=newXmlBeanFactory(newFileSystemResource(filePath));
ApplicationContextctx=newFileSystemXmlApplicationContext(filePath);
ShoppingshoppingA=null;
ShoppingshoppingB=null;

shoppingA=(Shopping)ctx.getBean("buyBean");
shoppingB=(Shopping)ctx.getBean("sellBean");
shoppingA.buySomething("something");
shoppingA.buyAnything("anything");
shoppingB.sellAnything("anything");
shoppingB.sellSomething("something");




}
}

运行结果：

可以看到我们定义的所有***sell***的方法，都被切入了前置通知

gaoxiang bye something success
gaoxiang bye anything success
Hello welcome to bye
gaoxiang sell anything success
Hello welcome to bye
gaoxiang sell something success