构建者

假设一个场景，可以在线的选取玩偶的一些零件，组装成玩偶，需要组装 头部 ，腹部，下肢

1.普通java对象

package com.mkb.creational.builder;
/**
 * @author meikb
 * @desc 比如创建机器角色  头  身体  腿
 * 正常情况是new 一个对象 然后一个个设置属性
 *
 *
 * @date 2020-05-08 15:26
 */
public class Actor {
    //=============头==============
    private String eye;//眼睛
    private String ear;//耳朵
    private String mouth; //嘴巴
    private String nose; //鼻子
    private String eyebrow; //眉毛
    //=============身体==============
    private String body;
    private String arm; //胳膊
    //=============腿==============
    private String leg; //腿
    private String foot; //脚
    private String shoes; //鞋
    public String getEye() {
        return eye;
    }
    public void setEye(String eye) {
        this.eye = eye;
    }
    public String getEar() {
        return ear;
    }
    public void setEar(String ear) {
        this.ear = ear;
    }
    public String getMouth() {
        return mouth;
    }
    public void setMouth(String mouth) {
        this.mouth = mouth;
    }
    public String getNose() {
        return nose;
    }
    public void setNose(String nose) {
        this.nose = nose;
    }
    public String getEyebrow() {
        return eyebrow;
    }
    public void setEyebrow(String eyebrow) {
        this.eyebrow = eyebrow;
    }
    public String getBody() {
        return body;
    }
    public void setBody(String body) {
        this.body = body;
    }
    public String getArm() {
        return arm;
    }
    public void setArm(String arm) {
        this.arm = arm;
    }
    public String getLeg() {
        return leg;
    }
    public void setLeg(String leg) {
        this.leg = leg;
    }
    public String getFoot() {
        return foot;
    }
    public void setFoot(String foot) {
        this.foot = foot;
    }
    public String getShoes() {
        return shoes;
    }
    public void setShoes(String shoes) {
        this.shoes = shoes;
    }
    @Override
    public String toString() {
        return "Actor{" +
                "eye='" + eye + '\'' +
                ", ear='" + ear + '\'' +
                ", mouth='" + mouth + '\'' +
                ", nose='" + nose + '\'' +
                ", eyebrow='" + eyebrow + '\'' +
                ", body='" + body + '\'' +
                ", arm='" + arm + '\'' +
                ", leg='" + leg + '\'' +
                ", foot='" + foot + '\'' +
                ", shoes='" + shoes + '\'' +
                '}';
    }
}

2 .构建器 抽象类

/**
 * @author meikb
 * @desc 构建者肯定与要拥有构建对象
 * @date 2020-05-08 15:34
 */
public abstract class ActorBuilder {
    //要拥有构建对象
    Actor actor = new Actor();
    public abstract void buildHead();
    public abstract void buildBody();
    public abstract void buildLegs();
    //把构建对象返回
    public Actor getActor() {
        return actor;
    }
}

3.具体的构建器1

/**
 * @author meikb
 * @desc
 * @date 2020-05-08 15:34
 */
public class AngelBuilder extends ActorBuilder{
    @Override
    public void buildHead() {
        actor.setNose("小鼻子");
        actor.setEar("小耳朵");
        actor.setEye("大眼睛");
        actor.setEyebrow("柳叶眉");
        actor.setMouth("小嘴巴");
        System.out.println("开始安装头部");
    }
    @Override
    public void buildBody() {
        actor.setBody("细腰");
        actor.setArm("细胳膊");
        System.out.println("开始安装身体");
    }
    @Override
    public void buildLegs() {
        actor.setLeg("大长腿");
        actor.setFoot("小脚");
        actor.setShoes("水晶鞋");
        System.out.println("开始安装下肢");
    }
}

4.具体构建器2

/**
 * @author meikb
 * @desc
 * @date 2020-05-08 15:34
 */
public class HeroBuilder extends ActorBuilder{
    @Override
    public void buildHead() {
        actor.setNose("大鼻子");
        actor.setEar("大耳朵");
        actor.setEye("大眼睛");
        actor.setEyebrow("浓眉");
        actor.setMouth("大嘴巴");
        System.out.println("开始安装头部");
    }
    @Override
    public void buildBody() {
        actor.setBody("大身板");
        actor.setArm("粗胳膊");
        System.out.println("开始安装身体");
    }
    @Override
    public void buildLegs() {
        actor.setLeg("长腿");
        actor.setFoot("大脚");
        actor.setShoes("球鞋");
        System.out.println("开始安装下肢");
    }
}

5.构建者持有构建器

/**
 * @author meikb
 * @desc 构建者 持有建造类
 * @date 2020-05-08 16:57
 */
public class Director {
    public Actor construct(ActorBuilder actorBuilder){
        actorBuilder.buildHead();
        actorBuilder.buildBody();
        actorBuilder.buildLegs();
        System.out.println("开始拼接");
        return actorBuilder.actor;
    }
}

6.主函数

/**
 * @author meikb
 * @desc
 * @date 2020-05-08 16:59
 */
public class ActorMain {
    public static void main(String[] args) {
        Director director = new Director();
        ActorBuilder heroBuilder = new HeroBuilder();
        Actor actor1 = director.construct(heroBuilder);
        System.out.println(actor1.toString());
        ActorBuilder angleBulider = new AngelBuilder();
        Actor actor2 = director.construct(angleBulider);
        System.out.println(actor2.toString());
//        bulidHero();
    }
    public static void bulidHero(){
        Actor hero = new Actor();
        buildHeroHead(hero);
        buildHeroBody(hero);
        buildHeroLegs(hero);
        System.out.println("开始拼接");
        System.out.println(hero.toString());
    }
    private static void buildHeroLegs(Actor hero) {
        hero.setLeg("长腿");
        hero.setFoot("大脚");
        hero.setShoes("球鞋");
        System.out.println("开始安装下肢");
    }
    private static void buildHeroBody(Actor hero) {
        hero.setBody("大身板");
        hero.setArm("粗胳膊");
        System.out.println("开始安装身体");
    }
    private static void buildHeroHead(Actor hero) {
        hero.setNose("大鼻子");
        hero.setEar("大耳朵");
        hero.setEye("大眼睛");
        hero.setEyebrow("浓眉");
        hero.setMouth("大嘴巴");
        System.out.println("开始安装头部");
    }
}