桥接模式

1.概念

桥接模式是抽象与实现分离，做到修改互不影响。

2.UML结构图

image.png

3.代码实现

实现类接口

/**
 * Created by ZW on 2019/7/8 22:33
 */
public interface Car {
    void buildCar();
}

具体接口实现类

/**
 * Created by ZW on 2019/7/8 22:34
 */
public class Truck implements Car{
    @Override
    public void buildCar() {
        Logger.getLogger("Truck").info("the car is truck");
    }
}

/**
 * Created by ZW on 2019/7/8 22:34
 */
public class Bus implements Car{
    @Override
    public void buildCar() {
        Logger.getLogger("Truck").info("the car is bus");
    }
}

抽象类

/**
 * Created by ZW on 2019/7/8 22:35
 */
public abstract class AbstractionCar {
    private Car mCar;

    public abstract void buildCar();

    public void setCar(Car car) {
        mCar = car;
    }

    public Car getCarIns(){
        return mCar;
    }
}

扩展抽象类

/**
 * Created by ZW on 2019/7/8 22:46
 */
public class RefinedAbstactionCar extends AbstractionCar{
    @Override
    public void buildCar() {
        getCarIns().buildCar();
    }
}

具体调用

/**
 * Created by ZW on 2019/7/8 22:37
 */
public class BridgeClient  {
    public void runCar(){
        AbstractionCar abstractionCar = new RefinedAbstactionCar();

        abstractionCar.setCar(new Bus());
        abstractionCar.buildCar();

        abstractionCar.setCar(new Truck());
        abstractionCar.buildCar();
    }
}