GOF设计模式——建造者模式

建造者模式

public class Car {
    private String name;//必选  车名
    private int money;//必选  车加钱
    private String type;//可选    车类型
    private String colour;//可选  车颜色

    public Car(String name, int money) {
        this.name = name;
        this.money = money;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Car car = (Car) o;
        return money == car.money && Objects.equals(name, car.name) && Objects.equals(type, car.type) && Objects.equals(colour, car.colour);
    }

    public void setType(String type) {
        this.type = type;
    }

    public void setColour(String colour) {
        this.colour = colour;
    }

    @Override
    public String toString() {
        return "Car{" +
                "name='" + name + '\'' +
                ", money=" + money +
                ", type='" + type + '\'' +
                ", colour='" + colour + '\'' +
                '}';
    }
}

/**
 * 抽象构建类
 */
public abstract class CarBuilder {
    public abstract void setType();

    public abstract void setColour();

    public abstract Car getCar();

}

/**
 * 实现构建类
 */
public class ADCarBuilder extends CarBuilder {
    private Car car;

    public ADCarBuilder(String name, int money) {
        this.car = new Car(name, money);
    }
    @Override
    public void setType() {
        car.setType("越野");
    }

    @Override
    public void setColour() {
        car.setColour("黑色");
    }

    @Override
    public Car getCar() {
        return car;
    }
}

/**
 * 实现构建类
 */
public class BMCarBuilder extends CarBuilder {
    private Car car;

    public BMCarBuilder(String name, int money) {
        car = new Car(name, money);
    }
    @Override
    public void setType() {
        car.setType("小轿车");
    }

    @Override
    public void setColour() {
        car.setColour("蓝色");
    }

    @Override
    public Car getCar() {
        return car;
    }
}

/**
 * 指导者类
 */
public class CarDirector {

    public void makeCar(CarBuilder builder) {
        builder.setColour();
        builder.setType();
    }
}

测试建造者模式

/**
 * 建造者模式
 */
public class TextBuilder {
    public static void main(String[] args) {
        //1
        CarDirector carDirector = new CarDirector();
        BMCarBuilder bmCarBuilder = new BMCarBuilder("宝马", 300000);
        //构建
        carDirector.makeCar(bmCarBuilder);
        System.out.println(bmCarBuilder.getCar());
        //2
        ADCarBuilder adCarBuilder = new ADCarBuilder("奥迪", 400000);
        carDirector.makeCar(adCarBuilder);
        System.out.println(adCarBuilder.getCar());
    }
}

测试结果：
Car{name=‘宝马’, money=300000, type=‘小轿车’, colour=‘蓝色’}
Car{name=‘奥迪’, money=400000, type=‘越野’, colour=‘黑色’}

标签：name,Car,car,GOF,建造,money,设计模式,public,String
来源： https://blog.csdn.net/lk0530/article/details/122213525