一、Spring中的Advisor，Advice，Point概述
1、Advisor：充当Advice和Pointcut的适配器，类似使用Aspect的@Aspect注解的类（前一章节所述）。一般有advice和pointcut属性。
祖先接口为org.springframework.aop.Advisor,应用中可直接使用org.springframework.aop.support.DefaultPointcutAdvisor
2、Advice：用于定义拦截行为，祖先接口为org.aopalliance.aop.Advice，该接口只是标识接口，应用中可直接实现BeforeAdvice ，ThrowsAdvice，MethodInterceptor ，AfterReturningAdvice ，IntroductionInterceptor 等子接口
3、Pointcut：用于定义拦截目标集合，祖先接口为org.springframework.aop.Pointcut
二、Spring中的Advisor，Advice，Point的应用
1、编写Advisor实现类
在此可直接使用org.springframework.aop.support.DefaultPointcutAdvisor
2、编写Advice实现类
public class PlayAdvice implements MethodBeforeAdvice{
public void before(Method method, Object[] args, Object target) throws Throwable { System.out.println("my before advice"); // method.invoke(target, args); 如果再调用这句，则目标方法会执行多一次 }}
3、编写Pointcut实现类
public class PlayPointcut implements Pointcut { public ClassFilter getClassFilter() { return new PlayClassFilter(); } public MethodMatcher getMethodMatcher() { return new PlayMethodMatcher(); }}//PlayClassFilter的定义class PlayClassFilter implements ClassFilter {
public boolean matches(Class clazz) { if(clazz.getSimpleName().equals("Play")) return true; return false; }}//PlayMethodMatcher的定义
class PlayMethodMatcher implements MethodMatcher {
public boolean isRuntime() { return true; } public boolean matches(Method method, Class c) { if(c.getSimpleName().equals("Play")&&method.getName().contains("Service")) return true; return false; } public boolean matches(Method method, Class c, Object[] args) { if(c.getSimpleName().equals("Play")&&method.getName().contains("Service")) return true; return false; }}
4、编写目标类
public class Play {public void playService(String what){
System.out.println("play "+what); }}5、在配置文件中配置
<bean id="adviceBean" class="com.hss.sp.aop.PlayAdvice"/><bean id="pointcutBean" class="com.hss.sp.aop.PlayPointcut"/><bean id="playService" class="com.hss.sp.service.Play"/><bean class="org.springframework.aop.support.DefaultPointcutAdvisor"> <property name="advice" ref="adviceBean"></property> <property name="pointcut" ref="pointcutBean"></property></bean>
6、测试，结果
BeanFactory bf=new ClassPathXmlApplicationContext("applicationContext.xml");
Play play=(Play)bf.getBean("playService"); play.playService("pingpong");输出：
my before advice
play pingpong