使用MethodInterceptor实现AOP 拦截机制

1. 先写出业务对象接口及实现业务对象。

 

 public interface Interface {
     public void hello();
 }

   这里写俩个实现。

 public class InterfaceImpl implements Interface {

     /**
      * @see com.alipay.aop.BusinessInterface#hello()
      */
     @Override
     public void hello() {
         System.out.println("AOP TEST!!");
     }
 }

 

 

 public class InterfaceImplTest implements Interface {

     /**
      * @see aop.Interface#hello()
      */
     @Override
     public void hello() {
         System.out.println("helo world!!");
     }

 }

 

 

2. 实现自己的代理，创建自己的interceptor

 

 public class MyInterceptor implements MethodInterceptor {

     /**
      * @see org.aopalliance.intercept.MethodInterceptor#invoke(org.aopalliance.intercept.MethodInvocation)
      */
     @Override
     public Object invoke(MethodInvocation methodInvocation) throws Throwable {
         String info = methodInvocation.getMethod().getDeclaringClass()+ "." +
         methodInvocation.getMethod().getName() + "()";

         System.out.println(info);

         try{
             Object result = methodInvocation.proceed();
             return result;
         }
         finally{
             System.out.println(info);
         }
     }
 }

 

3. 配置文件

 <?xml version="1.0" encoding="GBK"?>

 <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:p="http://www.springframework.org/schema/p"
     xmlns:sofa="http://img.alipay.net/dtd/schema/service"
     xmlns:context="http://www.springframework.org/schema/context"
     xmlns:webflow="http://www.springframework.org/schema/webflow-config"
     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
          http://img.alipay.net/dtd/schema/service http://img.alipay.net/dtd/schema/service/sofa-service.xsd
          http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
          http://www.springframework.org/schema/webflow-config http://www.springframework.org/schema/webflow-config/spring-webflow-config-2.0.xsd"
     default-autowire="byName">

     <bean id="beanTarget" class="aop.InterfaceImpl"/>

     <bean id="hello" class="aop.InterfaceImplTest" />

     <bean id="myInterceptor" class="aop.MyInterceptor"/>

     <bean id="bean" class="org.springframework.aop.framework.ProxyFactoryBean">
         <property name="proxyInterfaces">
             <value>aop.Interface</value>
         </property>

         <property name="interceptorNames">
             <list>
                 <value>myInterceptor</value>
                 <value>beanTarget</value>
             </list>
         </property>
     </bean>

     <bean id="testBean" class="org.springframework.aop.framework.ProxyFactoryBean">
         <property name="proxyInterfaces">
             <value>aop.Interface</value>
         </property>

         <property name="interceptorNames">
             <list>
                 <value>myInterceptor</value>
                 <value>hello</value>
             </list>
         </property>
     </bean>
 </beans>

 

 

 

4. 测试代码

 

 

 public class Main {

     /**
      *
      * @param args
      */
     public static void main(String[] args) {
         ClassPathResource resource = new ClassPathResource("spring.xml");
         XmlBeanFactory beanFactory = new XmlBeanFactory(resource);
         Interface bean = (Interface)beanFactory.getBean("bean");
         bean.hello();

         Interface testBean = (Interface)beanFactory.getBean("testBean");
         testBean.hello();
     }
 }