aop编程之前置通知

1 package com.LHB.aop;
2 
3 public interface TestServiceInterface {
4 
5     public void sayHello();
6 }

1 package com.LHB.aop;
2 
3 public interface TestServiceInterface2 {
4 
5     public void sayBye();
6 }

 1 package com.LHB.aop;
 2 
 3 public class testService implements TestServiceInterface,TestServiceInterface2 {
 4 
 5     private String name;
 6     public String getName() {
 7         return name;
 8     }
 9     public void setName(String name) {
10         this.name = name;
11     }
12     @Override
13     public void sayHello() {
14         // TODO Auto-generated method stub
15 
16         System.out.println("hello " + name);
17     }
18     @Override
19     public void sayBye() {
20         // TODO Auto-generated method stub
21         System.out.println("Bye "+ name);
22     }
23 
24 }

 1 package com.LHB.aop;
 2 
 3 import java.lang.reflect.Method;
 4 
 5 import org.springframework.aop.MethodBeforeAdvice;
 6 
 7 public class MyMethodBeforeAdvice implements MethodBeforeAdvice {
 8 
 9     /**
10      * 功能：该函数将在目标函数执行前首先执行
11      * method:被调用方法名字
12      * args：给method传递的参数
13      * target：被代理的目标对象
14      */
15     @Override
16     public void before(Method method, Object[] args, Object target)
17             throws Throwable {
18         // TODO Auto-generated method stub
19         //method.getName()方法将得到目标函数的函数名称
20         System.out.println("记录日志...." + method.getName());
21     }
22 
23 }

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xmlns:context="http://www.springframework.org/schema/context"
 5        xsi:schemaLocation="http://www.springframework.org/schema/beans
 6                 http://www.springframework.org/schema/beans/spring-beans.xsd
 7                 http://www.springframework.org/schema/context
 8                 http://www.springframework.org/schema/context/spring-context.xsd">
 9           
10    <!--4.1 配置一个被代理的对象即目标对象-->             
11    <bean id="testService" class="com.LHB.aop.testService">
12        <property name="name" value="张三" />
13    </bean>
14    <!--4.2 配置前置通知 -->
15    <bean id="MyMethodBeforeAdvice" class="com.LHB.aop.MyMethodBeforeAdvice" />
16    <!--4.3 配置代理对象 -->
17    <bean id="ProxyFactoryBean" class="org.springframework.aop.framework.ProxyFactoryBean">
18        <!--4.3.1 配置代理接口集 -->
19        <property name="proxyInterfaces">
20                 <list>
21                     <value>com.LHB.aop.TestServiceInterface</value>
22                     <value>com.LHB.aop.TestServiceInterface2</value>
23                 </list>   
24        </property>
25        <!--4.3.2 把通知织入到代理对象 -->
26    <property name="interceptorNames">
27        <!-- 相当于把MyMethodBeforeAdvice前置通知把代理对象关联起来，也可以把通知看成拦截器 -->
28        <value>MyMethodBeforeAdvice</value>
29    </property>
30    <!--4.3.3 配置被代理对象可以指定 -->
31    <property name="target" ref="testService"/>
32 
33    </bean>
34    
35 </beans>

 1 package com.LHB.aop;
 2 
 3 import org.springframework.context.ApplicationContext;
 4 import org.springframework.context.support.ClassPathXmlApplicationContext;
 5 
 6 public class App {
 7 
 8     public static void main(String[] args) {
 9         // TODO Auto-generated method stub
10         ApplicationContext ac = new ClassPathXmlApplicationContext("com/LHB/aop/beans.xml");
11         TestServiceInterface tsi = (TestServiceInterface) ac.getBean("ProxyFactoryBean");
12         tsi.sayHello();
13         ((TestServiceInterface2)tsi).sayBye();
14         
15     }
16 
17 }