JAVA: 动态代理

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"));
  }

}