02建造者模式

一、定义一个抽象建造者类

二、创建一个产品类

package com.bjpowernode.Factory.builder;

public class Product {
    private String buildA;
    private String buildB;
    private String buildC;
    private String buildD;



    public String getBuildA() {
        return buildA;
    }

    public void setBuildA(String buildA) {
        this.buildA = buildA;
    }

    public String getBuildB() {
        return buildB;
    }

    public void setBuildB(String buildB) {
        this.buildB = buildB;
    }

    public String getBuildC() {
        return buildC;
    }

    public void setBuildC(String buildC) {
        this.buildC = buildC;
    }

    public String getBuildD() {
        return buildD;
    }

    public void setBuildD(String buildD) {
        this.buildD = buildD;
    }
    @Override
    public String toString() {
        return "Product{" +
                "buildA='" + buildA + ''' +
                ", buildB='" + buildB + ''' +
                ", buildC='" + buildC + ''' +
                ", buildD='" + buildD + ''' +
                '}';
    }
}

三、创建一个Worker类

package com.bjpowernode.Factory.builder;

public class Worker extends Builder {
    private Product product;

    public Worker() {
        product = new Product();
    }
    @Override
    void buildA() {
        product.setBuildA("地基");
        System.out.println("地基");
    }

    @Override
    void buildB() {
        product.setBuildB("钢筋");
        System.out.println("钢筋");
    }

    @Override
    void buildC() {
        product.setBuildC("铺电线");
        System.out.println("铺电线");
    }

    @Override
    void buildD() {
        product.setBuildD("粉刷");
        System.out.println("粉刷");
    }

    @Override
    Product getProduct() {
        return product;
    }
}

四、核心 ：创建一个指挥Director类

package com.bjpowernode.Factory.builder;

//指挥核心，负责建造一个工程
public class Director {
    public Product build(Builder builder){

        //指挥工人按照顺序建造房子
        builder.buildA();
        builder.buildB();
        builder.buildC();
        builder.buildD();

        return builder.getProduct();
    }
}

五、测试

第二种也是类是

服务员自主搭配套餐，用户也可以自己选择

所以相对于第一种少了Director类

指挥用于：建造顺序

这边用户就可以自己随心所欲自由搭配