本文简单讲述下桥接模式。
商场中的商品以电脑为例,如何处理商品的分类销售呢?可以使用多重继承结构的方式。如图:
1、扩展性问题(类个数膨胀的问题)
/*** 品牌* @author tqq* @date 2021-04-05-20:44*/
public interface Brand {void sale();
}
class Lenovo implements Brand{@Overridepublic void sale() {System.out.println("销售联想电脑");}
}
class Dell implements Brand{@Overridepublic void sale() {System.out.println("销售戴尔电脑");}
}
class Huawei implements Brand{@Overridepublic void sale() {System.out.println("销售Huawei电脑");}
}
/*** 电脑类型维度* @author tqq* @date 2021-04-05-20:47*/
public class Computer2 {protected Brand brand;public Computer2(Brand brand) {this.brand = brand;}public void sale(){brand.sale();}
}
class Desktop2 extends Computer2{public Desktop2(Brand brand) {super(brand);}@Overridepublic void sale() {
// super.sale();brand.sale();System.out.println("销售台式机");}
}
class Laptop2 extends Computer2{public Laptop2(Brand brand) {super(brand);}@Overridepublic void sale() {
// super.sale();brand.sale();System.out.println("销售笔记本电脑");}
}
class Pad2 extends Computer2{public Pad2(Brand brand) {super(brand);}@Overridepublic void sale() {brand.sale();System.out.println("销售平板电脑");}
}
client调用
public class Client {public static void main(String[] args) {
// Computer2 laptop2 = new Laptop2(new Lenovo());
// laptop2.sale();
//
// Computer2 computer2 = new Desktop2(new Lenovo());
// computer2.sale();
//
// Computer2 huawei = new Desktop2(new Huawei());
// huawei.sale();Pad2 pad2 = new Pad2(new Huawei());pad2.sale();}
}
注:
本文参考北京尚学堂设计模式课程