设计模式-简单工厂 --工厂模式--抽象模式

Posted 2020-09-30 luzhouxiaoshuai

 

1 、简单工厂模式

package com.bjsxt.factory.simplefactory;

public interface Car {
    void run();
}

package com.bjsxt.factory.simplefactory;

public class Audi implements Car {

    @Override
    public void run() {
        System.out.println("奥迪再跑！");
    }

}

package com.bjsxt.factory.simplefactory;

public class Byd implements Car {

    @Override
    public void run() {
        System.out.println("比亚迪再跑！");
    }

}

package com.bjsxt.factory.simplefactory;

public class CarFactory {
    
    public static  Car createCar(String type){
        if("奥迪".equals(type)){
            return new Audi();
        }else if("比亚迪".equals(type)){
            return new Byd();
        }else{
            return null;
        }
    }
    
}

调用者：如何没有使用工厂模式

package com.bjsxt.factory.simplefactory;

/**
 * 测试在没有工厂模式的情况下
 * @author 尚学堂高淇 www.sxt.cn
 *
 */
public class Client01 {   //调用者
    
    public static void main(String[] args) {
        Car c1 = new Audi();
        Car c2 = new Byd();
        
        c1.run();
        c2.run();
        
    }
}

如果使用简单工厂模式：

package com.bjsxt.factory.simplefactory;

/**
 * 简单工厂情况下
 * @author 尚学堂高淇 www.sxt.cn
 *
 */
public class Client02 {   //调用者
    
    public static void main(String[] args) {
        Car c1 =CarFactory.createCar("奥迪");
        Car c2 = CarFactory.createCar("比亚迪");
        
        c1.run();
        c2.run();
        
    }
}

简单工厂的缺点：

下面我们来看工厂模式：

我们首先定义了工厂抽象类的接口：

package com.bjsxt.factory.factorymethod;

public interface CarFactory {
    Car createCar();
}

package com.bjsxt.factory.factorymethod;

public class AudiFactory implements CarFactory {

    @Override
    public Car createCar() {
        return new Audi();
    }

}

package com.bjsxt.factory.factorymethod;

public class BenzFactory implements CarFactory {

    @Override
    public Car createCar() {
        return new Benz();
    }

}

package com.bjsxt.factory.factorymethod;

public class BydFactory implements CarFactory {

    @Override
    public Car createCar() {
        return new Byd();
    }

}

package com.bjsxt.factory.factorymethod;


public class Client {
    public static void main(String[] args) {
        Car c1 = new AudiFactory().createCar();
        Car c2 = new BydFactory().createCar();
        
        c1.run();
        c2.run();
    }
}

 

抽象工厂模式：

 

比如一个汽车的一个产品族：包括汽车发动机、汽车座椅 汽车 轮胎

package com.bjsxt.factory.abstractFactory;

public interface CarFactory {
    Engine createEngine();
    Seat createSeat();
    Tyre createTyre();
}

 

package com.bjsxt.factory.abstractFactory;

public interface Engine {
    void run();
    void start();
}


class LuxuryEngine implements Engine{

    @Override
    public void run() {
        System.out.println("转的快！");
    }

    @Override
    public void start() {
        System.out.println("启动快!可以自动启停！");
    }
    
}

class LowEngine implements Engine{
    
    @Override
    public void run() {
        System.out.println("转的慢！");
    }
    
    @Override
    public void start() {
        System.out.println("启动慢!");
    }
    
}

package com.bjsxt.factory.abstractFactory;

public interface Seat {
    void massage();
}

class LuxurySeat implements Seat {

    @Override
    public void massage() {
        System.out.println("可以自动按摩！");
    }
    
}
class LowSeat implements Seat {

    @Override
    public void massage() {
        System.out.println("不能按摩！");
    }
    
}

package com.bjsxt.factory.abstractFactory;

public interface Tyre {
    void revolve();
}

class LuxuryTyre implements Tyre {

    @Override
    public void revolve() {
        System.out.println("旋转不磨损！");
    }
    
}

class LowTyre implements Tyre {

    @Override
    public void revolve() {
        System.out.println("旋转磨损快！");
    }
    
}

package com.bjsxt.factory.abstractFactory;

public class LowCarFactory implements CarFactory {

    @Override
    public Engine createEngine() {
        return new LowEngine();
    }

    @Override
    public Seat createSeat() {
        return new LowSeat();
    }

    @Override
    public Tyre createTyre() {
        return new LowTyre();
    }


}

package com.bjsxt.factory.abstractFactory;

public class LuxuryCarFactory implements CarFactory {

    @Override
    public Engine createEngine() {
        return new LuxuryEngine();
    }

    @Override
    public Seat createSeat() {
        return new LuxurySeat();
    }

    @Override
    public Tyre createTyre() {
        return new LuxuryTyre();
    }


}

package com.bjsxt.factory.abstractFactory;

public class Client {

    public static void main(String[] args) {
        CarFactory  factory = new LuxuryCarFactory();
        Engine e = factory.createEngine();
        e.run();
        e.start();
        
        
    }
}

 

 一个高端的汽车由高端发动机、高端座椅、高端轮胎构成