java设计模式 GOF23 03 建造类模式

Posted 2020-06-23

package com.lz.builder;

/*
 * 组装者实现类，提供一个可以获取产品的公共方法
 */
public class LzCarDirector implements CarDirector{
    private CarBuilder cb;
    private Car car;
    
    public LzCarDirector(CarBuilder cb) {
        this.cb = cb;
    }

    @Override
    public Car CarDirector() {
        Car car = new Car(cb.BuilderDoor(), cb.BuilderEngine(), cb.BuilderTyre());
        return car;
    }
}

package com.lz.builder;

/*
 * 建造者接口
 */
public interface CarBuilder {
    Door BuilderDoor();
    Engine BuilderEngine();
    Tyre BuilderTyre();
}

package com.lz.builder;
/*
 * 组装者接口
 */
public interface CarDirector {
    Car CarDirector();
}

package com.lz.builder;

/*
 * 建造者实现类
 */
public class LzCarBuilder implements CarBuilder{

    @Override
    public Door BuilderDoor() {
        return new Door("车门");
    }

    @Override
    public Engine BuilderEngine() {
        return new Engine("发动机");
    }

    @Override
    public Tyre BuilderTyre() {
        return new Tyre("轮胎");
    }

}

package com.lz.builder;

/*
 * 产品类：有多个组件
 * 将这些类的实现封装，用户只需要调用制造着和组装者就可以得到
 * 实现类。
 */
public class Car {
    private Door door;
    private Engine engine;
    private Tyre tyre;
    public Car() {
    }
    public Car(Door door, Engine engine, Tyre tyre) {
        super();
        this.door = door;
        this.engine = engine;
        this.tyre = tyre;
    }
    public Door getDoor() {
        return door;
    }
    public void setDoor(Door door) {
        this.door = door;
    }
    public Engine getEngine() {
        return engine;
    }
    public void setEngine(Engine engine) {
        this.engine = engine;
    }
    public Tyre getTyre() {
        return tyre;
    }
    public void setTyre(Tyre tyre) {
        this.tyre = tyre;
    }
}

class Door {
    private String name;
    public Door() {
    }
    public Door(String name) {
        super();
        this.name = name;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

class Engine {
    private String name;
    public Engine() {
    }
    public Engine(String name) {
        super();
        this.name = name;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

class Tyre {
    private String name;
    public Tyre() {
    }
    public Tyre(String name) {
        super();
        this.name = name;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

package com.lz.builder;

/*
 * 测试类
 */
public class Test {
    public static void main(String[] args) {
        Car car = new LzCarDirector(new LzCarBuilder()).CarDirector();
        System.out.println(car.getDoor().getName());
        System.out.println(car.getEngine().getName());
        System.out.println(car.getTyre().getName());
    }
}