小试牛刀-自己写一个构造器

定义：构造器是通过方法分离的形式传入参数，最后一步调用build（）返回生成构造的对象。

我自定义了一个构造一个屋子的构造器，它能灵活根据需求生成属性。

/**
 * 房子构造器
 * Created on 2023/07/24 by Qi.
 */
public class HouseBuilder {
    private final House house;

    public HouseBuilder()
    {
        this.house = new House();
    }

    public static HouseBuilder create(){
        return new HouseBuilder();
    }

    public HouseBuilder woodType(int woodType){
        this.house.getRoof().setWoodType(woodType);
        return this;
    }

    public HouseBuilder door(String door){
        this.house.setDoor(door);
        return this;
    }

    public HouseBuilder windows(String windows){
        this.house.setWindows(windows);
        return this;
    }

    public HouseBuilder rooms(int room){
        this.house.setRooms(room);
        return this;
    }

    public House build(){
        return house;
    }

    public static void main(String[] args) {
        House house = HouseBuilder.create()
                .door("白色木门")
                .rooms(2)
                .windows("3个窗户")
                .woodType(1)
                .build();
        System.out.println();
    }
}

Bean类：

/**
 * 房子的构造
 * Created on 2023/07/24 by Qi.
 */
@Data
public class House {
    /**
     * 屋顶
     */
    private Roof roof;
    /**
     * 房间 1：1个房间 2：两个房间
     */
    private int rooms;
    /**
     * 窗户种类　CIRCLE　SQUARE
     */
    private String windows;
    /**
     * 门的种类 BIG SMALL
     */
    private String door;

    public Roof getRoof(){
        return roof == null ? roof =new Roof():roof;
    }


}

/**
 * 房顶
 * Created on 2023/07/24 by Qi.
 */
@Data
public class Roof {
    /**
     * 1: 榉木 2：黄花梨 3：檀木
     */
    private int woodType;
    /**
     * 屋顶高度 : 厘米
     */
    private int height;
    /**
     * 形状
     */
    private int shape;
}