设计模式——代理模式

题目：、生产商(Factory)需要销售商品(Product)，网上商城(E-Shop)提供了一个平台，可以帮助销售这些商品，获得更大的销量。当顾客(Custom)从网上商城选购商品的时候，实际是从生产商获得的商品。应用代理模式，用java控制台应用程序改进该设计。

定义接口Business

package MyProexy;

public interface Business {
    void sell(String product);

    void buy(String product);
}

工厂类

package MyProexy;

public class Factory {

    public String name;

    public void setName(String name) {
        this.name = name;
    }

    public String get(){
        return name;
    }

}

定义商店

package MyProexy;

public class E_shop implements  Business {
    Factory factory;

    public E_shop(Factory factory) {
        this.factory = factory;
    }

    @Override
    public void sell(String product) {
        System.out.println("有人要买卖"+product+"望及时回购");

    }

    @Override
    public void buy(String product) {
        System.out.println("有人要买"+product+"请尽早发货");
    }

}

定义顾客

package MyProexy;

public class Custom implements Business {
    E_shop e_shop;

    public Custom(Factory factory) {
        this.e_shop = new E_shop(factory);
    }

    @Override
    public void sell(String product) {
        e_shop.sell(product);
    }

    @Override
    public void buy(String product) {
        e_shop.buy(product);
    }
}

测试

package MyProexy;

public class DemoProexy {
    public static void main(String[] args) {
        Factory factory = new Factory();
        Custom custom = new Custom(factory);
        custom.buy("iphone6Plus");
        custom.sell("iphone4s");
    }
}

运行结果：

UML