Java 动态代理2

当被代理类没有实现接口时，可以用CGLib实现动态代理

import java.lang.reflect.Method;

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

public class CglibProxyFactory implements MethodInterceptor{
	private Object object;
	private Advisor advisor;
	
	 public Object getProxyInstance(Object object, Advisor advisor){
		 this.object=object;
		 Enhancer enhancer = new Enhancer();
		 enhancer.setSuperclass(this.object.getClass());
		 enhancer.setCallback(this);
		 return enhancer.create();
	 }

	@Override
	public Object intercept(Object proxy, Method method, Object[] args,
			MethodProxy methodProxy) throws Throwable {
		
		Object result=null;
		advisor.before();
		try {
			result = methodProxy.invoke(object, args);
			advisor.after();
		} catch (Exception e) {
			advisor.exception();
			e.printStackTrace();
		}finally{
			advisor.finaller();
		}
		return result;
	}
}

public abstract class Advisor {

	public void before(){
		
	}
	
	public void after(){
		
	}
	
	public void exception(){
			
	}
	
	public void finaller(){
		
	}	
}