动态代理记录

@动态代理

jdk动态代理

创建代理

public class DynamicProxyNew<T> implements InvocationHandler {

    private T target;

    public T getProxy(T object){
        this.target = object;
        return (T) Proxy.newProxyInstance(object.getClass().getClassLoader(), object.getClass().getInterfaces(), this);
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        Object result = null;
        System.out.println("start");
        result = method.invoke(target, args);
        System.out.println("end");
        return result;
    }
}

使用代理

Video video = new DynamicProxyNew<Video>().getProxy(new Mp3());
video.play();