使用DefaultAdvisorAutoProxyCreator实现spring的自动代理

出处：http://blog.csdn.net/daryl715/article/details/1621610

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