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  ... {
  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 >
 
  <!--  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  ... {

    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;
        
        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