dynamic proxy of JDK

Service.java

public interface Service {

    //目标方法
    public abstract void add();

}

class UserServiceImpl implements Service {

    public void add() {
        System.out.println("This is add service");
    }

}

class MyInvocatioHandler implements InvocationHandler {

    private Object target;

    public MyInvocatioHandler(Object target) {
        this.target = target;
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {

        System.out.println("-----before-----");

        Object result = method.invoke(target, args);

        System.out.println("-----end-----");

        return result;
    }

    public Object getProxy() {

        ClassLoader loader = Thread.currentThread().getContextClassLoader();

        Class<?>[] interfaces = target.getClass().getInterfaces();

        return Proxy.newProxyInstance(loader, interfaces, this);
    }

}

class ProxyTest {
    public static void main(String[] args) {

        Service service = new UserServiceImpl();

        MyInvocatioHandler handler = new MyInvocatioHandler(service);

        Service serviceProxy = (Service) handler.getProxy();

        serviceProxy.add();
    }
}


//参考资料
//http://mp.weixin.qq.com/s?__biz=MzIwMzY1OTU1NQ==&mid=2247483854&idx=1&sn=3dea3d634e99bae34978c544852a08a8&chksm=96cd4182a1bac894c3ce652396b32e9663f421bd4aeb5532c6b9d9ada6d194a1d5b22ea6b535&scene=21#wechat_redirect