jdk動態代理和cglib動態代理實現

1、JDK動態代理實現

代碼：

1. 接口類

public interface IProductProducer {
    void saleProduct(Float money);
}

2. 實現類

public interface IProductProducer {
    void saleProduct(Float money);
}

3. 測試類

public class ProxyTest {


    public static void main(String[] args){
        final ProducerImpl producer = new ProducerImpl();
        IProductProducer iproducer = (IProductProducer) Proxy.newProxyInstance(producer.getClass().getClassLoader(), producer.getClass().getInterfaces(), new InvocationHandler() {
            @Override
            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                for (Object oj: args){
                    System.out.println(args);
                }

                Object result = null;
                System.out.println("商品售賣前！");
                result = method.invoke(producer, (Float)args[0]*0.8f);
                System.out.println("商品售賣後！");
                return result;
            }
        });
        iproducer.saleProduct(1000f);
    }
}

運行結果：

2、cglib動態代理實現

代碼：

1. 業務類

public class CglibProxy {
    public void saleProduct(Float money) {
        System.out.println("商品售賣中,價格："+money);
    }
    public void backProuct(){
        System.out.println("退貨了！");
    }

}

2. 測試類

public class CglibTest {
    public static void main(String[] args){
        final CglibProxy cglibProxy = new CglibProxy();
        CglibProxy cglibProxy1 = (CglibProxy) Enhancer.create(cglibProxy.getClass(), new MethodInterceptor() {
            @Override
            public Object intercept(Object o, Method method, Object[] objects, MethodProxy methodProxy) throws Throwable {
                for (Object oj: objects){
                    System.out.println(objects);
                }

                Object result = null;
                System.out.println("商品售賣前！");
                if (objects.length <= 0){
                    result = method.invoke(cglibProxy);
                }else {
                    result = method.invoke(cglibProxy, (Float)objects[0]*0.8f);
                }

                System.out.println("商品售賣後！");
                return result;
            }
        });
        cglibProxy1.saleProduct(200f);
        cglibProxy1.backProuct();
    }
}

運行結果：