设计模式之建造者模式

建造者模式（Builder Pattern）使用多个简单的对象一步一步构建成一个复杂的对象。这种类型的设计模式属于创建型模式，它提供了一种创建对象的最佳方式。

一个 Builder 类会一步一步构造最终的对象。该 Builder 类是独立于其他对象的。

步骤接口

/**
 * @Author: chuan.bai
 * @Description 泡茶接口
 * @Date: Created on 16:45 2021/3/26
 * @Modified By:
 */
public interface MakeTeaService {

    //准备茶叶
    void prepareTeaLeaf();
    //放入杯中
    void putInTheCup();
    //导入热水
    void pourHotWater();
}

步骤的具体实现

/**
 * @Author: chuan.bai
 * @Description 泡绿茶 具体步骤
 * @Date: Created on 16:49 2021/3/26
 * @Modified By:
 */
public class MakeGreenTea implements MakeTeaService{
    @Override
    public void prepareTeaLeaf() {
        System.out.println("准备绿茶");
    }

    @Override
    public void putInTheCup() {
        System.out.println("把绿茶放入杯中");
    }

    @Override
    public void pourHotWater() {
        System.out.println("把热水倒入杯中");
    }
}


/**
 * @Author: chuan.bai
 * @Description 泡红茶 具体步骤
 * @Date: Created on 16:49 2021/3/26
 * @Modified By:
 */
public class MakeRedTea implements MakeTeaService{
    @Override
    public void prepareTeaLeaf() {
        System.out.println("准备红茶");
    }

    @Override
    public void putInTheCup() {
        System.out.println("把红茶放入杯中");
    }

    @Override
    public void pourHotWater() {
        System.out.println("把热水倒入杯中");
    }
}

泡茶建造者

/**
 * @Author: chuan.bai
 * @Description  泡茶建造借口
 * @Date: Created on 16:52 2021/3/26
 * @Modified By:
 */
public interface MakeTeaBuilder {

    //泡茶接口
    void makeTea();
}

泡红茶绿茶的建造者

/**
 * @Author: chuan.bai
 * @Description  泡红茶的建造者
 * @Date: Created on 16:55 2021/3/26
 * @Modified By:
 */
public class MakeRedTeaBuilder implements MakeTeaBuilder {
    MakeRedTea makeRedTea = new MakeRedTea();

    @Override
    public void makeTea() {
        makeRedTea.prepareTeaLeaf();
        makeRedTea.putInTheCup();
        makeRedTea.pourHotWater();
    }


}


/**
 * @Author: chuan.bai
 * @Description  泡绿茶的建造者
 * @Date: Created on 16:55 2021/3/26
 * @Modified By:
 */
public class MakeGreenTeaBuilder implements MakeTeaBuilder {
    MakeGreenTea makeGreenTea = new MakeGreenTea();

    @Override
    public void makeTea() {
        makeGreenTea.prepareTeaLeaf();
        makeGreenTea.putInTheCup();
        makeGreenTea.pourHotWater();
    }


}

生产方

/**
 * @Author: chuan.bai
 * @Description
 * @Date: Created on 16:57 2021/3/26
 * @Modified By:
 */
public class Director {
    public static void main(String[] args) {
        /**
         * 泡绿茶
         */
        MakeGreenTeaBuilder makeGreenTeaBuilder =new MakeGreenTeaBuilder();
        makeGreenTeaBuilder.makeTea();

        /**
         * 泡红茶
         */
        MakeRedTeaBuilder makeRedTeaBuilder = new MakeRedTeaBuilder();
        makeRedTeaBuilder.makeTea();

    }
}

输出结果

准备绿茶
把绿茶放入杯中
把热水倒入杯中
准备红茶
把红茶放入杯中
把热水倒入杯中

Process finished with exit code 0