1.JDK动态代理，只能代理接口
2.CGLIB动态代理，不能代理final方法

package service;

public class HelloService {
public String sayHello(String str)
{
return ("Hello "+str);
}

final public String sayGoodbye(String str)
{
return "goodbye "+str;
}

}

package service;

import java.lang.reflect.Method;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

class MyInterceptor implements MethodInterceptor
{
HelloService hs;

public HelloService getHs() {
return hs;
}



public void setHs(HelloService hs) {
this.hs = hs;
}



@Override
public Object intercept(Object object, Method method, Object[] args, MethodProxy methodProxy) throws Throwable {
System.out.println("before......");
return methodProxy.invokeSuper(object, args);


}

}

public class ProxyService {

public static HelloService getProxy()
{



Enhancer enhancer=new Enhancer();
enhancer.setSuperclass(HelloService.class);
enhancer.setCallback(new MyInterceptor());
return (HelloService)enhancer.create();
}

}

package action;

import service.HelloService;
import service.ProxyService;

public class TestProxy {

public static void main(String[] args) {
HelloService hs=ProxyService.getProxy();
// System.out.println(hs.sayHello("tianda"));
System.out.println(hs.sayGoodbye("tianda"));
}

}