【Java设计模式】用盖房子案例讲解建造者模式(生成器模式)

public abstract class AbstractHouse {
    //打地基
    public abstract void buildBasic();
    //砌墙
    public abstract void buildWalls();
    //封装屋顶
    public abstract void roofed();
    //开始建房子
    public void build() {
        buildBasic();
        buildWalls();
        roofed();
    }
}

public class CommonHouse extends AbstractHouse {
    @Override
    public void buildBasic() {
        System.out.println("普通房子开始打地基");
    }
    @Override
    public void buildWalls() {
        System.out.println("普通房子开始建墙了");
    }
    @Override
    public void roofed() {
        System.out.println("普通房子准备封顶喽");
    }
}

public class Client {
    public static void main(String[] args) {
        CommonHouse commonHouse = new CommonHouse();
        commonHouse.build();
    }
}

public class House {
    private String baise;
    private String wall;
    private String roofed;
    public String getBaise() {
        return baise;
    }
    public void setBaise(String baise) {
        this.baise = baise;
    }
    public String getWall() {
        return wall;
    }
    public void setWall(String wall) {
        this.wall = wall;
    }
    public String getRoofed() {
        return roofed;
    }
    public void setRoofed(String roofed) {
        this.roofed = roofed;
    }
}

public abstract class HouseBuilder {
    public House house = new House();
    //将建造的流程写好，抽象的方法
    public abstract void buildBasic();
    public abstract void buildWalls();
    public abstract void roofed();
    //建造房子好后，将产品(房子)返回
    public House buildHouse() {
        return house;
    }
}

public class HouseDirector {
    HouseBuilder houseBuilder = null;
    //空参构造器
    public HouseDirector() {
    }
    //通过setter传入houseBuilder
    public void setHouseBuilder(HouseBuilder houseBuilder) {
        this.houseBuilder = houseBuilder;
    }
    //如何处理建造房子的流程，交给指挥者
    public House constructorHouse() {
        houseBuilder.buildBasic();
        houseBuilder.buildWalls();
        houseBuilder.roofed();
        return houseBuilder.buildHouse();
    }
}

public class HighBuilding extends HouseBuilder {
    @Override
    public void buildBasic() {
        System.out.println("高楼房子开始打地基");
    }
    @Override
    public void buildWalls() {
        System.out.println("高楼房子开始建墙了");
    }
    @Override
    public void roofed() {
        System.out.println("高楼房子准备封顶喽");
    }
}

public class Client {
    public static void main(String[] args) {
        //准备创建房子的指挥者
        HouseDirector houseDirector = new HouseDirector();
        //盖高楼
        HighBuilding highBuilding = new HighBuilding();
        //重置建造者
houseDirector.setHouseBuilder(highBuilding);
        //完成盖房子，返回产品(高楼)
        houseDirector.constructorHouse();
    }
}