构造者模式

构造者模式解析:

Builder：是为创建一个Product对象的各个部件指定的抽象接口

ConcreteBuilder：它是具体的构建者，实现Builder接口，构造和装配各个部件。

Product：具体的产品

Director：指挥者，它是构建一个使用Builder接口的对象。

1.创建产品类:

//产品类：一般在产品类中写入要构建的一些功能.

public class Product{
    public Product(){
    }
}

2.抽象构造方法(这里一般是写构建的每一个细节)

//抽象建造方法：

abstract public class Builder{
    public abstract void buildPart1();//这里代表构建的细节

    public abstract void buildPart2();

    public abstract Product creat();
}

3.实现建造类,产品的零件制造

//具体的建造类：产品的零件制造

public class ConcreteBuilder extends Builder{

    private Product product = new Product() ;
    public void buildPart1(){
        System.out.println("build part one.");
    }

    public void buildPart2(){
        System.out.println("build part two.");
    }

    public Product create(){
        return product;
    }
}

4.产品的建造过程

//产品的建造过程：

public class Director{
    private Builder builder;

    public Director(Builder builder){
        this.builder = builder;
    }

    public void construct(){
        builder = new ConcreteBuilder();

        builder.buildPart1();

        builder.buildPart2();

        builder.create();

        //continue with other code
    }
}

5.测试

//测试：

public class Client{

    private static Director director;

    private static Builder builder = new ConcreteBuilder();

    public void requestBuild(){
        // director = new Director(builder);
    }

    public static void main(String[] args) {
        director = new Director(builder);
        director.construct();
    }

}