Sring 通过手工编码方式基于类的代理实现前置增强

Question

Waiter类：
public class Waiter {
public void greetTo(String name) {
System.out.println("waiter greet to "+name+"...");
}

public void serveTo(String name){
    System.out.println("waiter serving "+name+"...");
}

}
TestAdvisorByProxyFactory类：
public class TestAdvisorByProxyFactory {
public static void main(String[] args) {
Waiter waiterTarget = new Waiter();
BeforeAdvice advice = new GreetingBeforeAdvice();
Advisor advisor = new GreetingAdvisor();
ProxyFactory pf = new ProxyFactory();
pf.setOptimize(true);
pf.addAdvice(advice);
pf.addAdvisor(advisor);
Waiter waiter = (Waiter) pf.getProxy();
waiter.greetTo("john");
waiter.serveTo("john");
}
}
运行时候报错：
Exception in thread "main" org.springframework.aop.framework.AopConfigException: TargetSource cannot determine target class: Either an interface or a target is required for proxy creation.
at org.springframework.aop.framework.DefaultAopProxyFactory.createAopProxy(DefaultAopProxyFactory.java:56)
at org.springframework.aop.framework.ProxyCreatorSupport.createAopProxy(ProxyCreatorSupport.java:105)
at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:96)
at cn.zw.test.advisor.TestAdvisorByProxyFactory.main(TestAdvisorByProxyFactory.java:20)
怎么修改才能运行呢？

Answer 1

自己来回答吧：
TestAdvisorByProxyFactory类：
public class TestAdvisorByProxyFactory {
public static void main(String[] args) {
Waiter waiterTarget = new Waiter();
BeforeAdvice advice = new GreetingBeforeAdvice();
//把织入切面注释掉
//Advisor advisor = new GreetingAdvisor();
ProxyFactory pf = new ProxyFactory();
pf.setOptimize(true);
pf.addAdvice(advice);
//pf.addAdvisor(advisor);
pf.setTarget(waiterTarget);
Waiter waiter = (Waiter) pf.getProxy();
waiter.greetTo("john");
waiter.serveTo("john");
}
}
现在还没找到织入切面了以后怎么运行，等找到了在更新。