设计模式之建造者模式

建造者模式：将一个复杂对象的构建和它的表示分离，使得同样的构建过程可以创建不同的表示。

 

1.建造者

public interface Builder{
    public void buildBody();
    public void buildHead();
    public Product getProducts();
}

2.具体的建造者

public class ConcreteBuilder implements Builder {
    private Product product = new Product();

    @Override
    public void buildBody() {
        product.addProduct("Body");
    }

    @Override
    public void buildHead() {
        product.addProduct("Head");
    }

    @Override
    public Product getProducts() {
        return product;
    }
}

3.产品类

public  class Product{
    List<String> lists=new ArrayList<>();
    public void addProduct(String pro){
        lists.add(pro);
    }

    public void showProduct(){
        System.out.println("Building...");
        for (String list : lists) {
            System.out.println(list);
        }
    }
}

4.指挥者

public class Director{
    public void buildResult(Builder builder){
        builder.buildBody();
        builder.buildHead();
    }
}

5.Demo

public class BuilderDemo{
    public static void main(String[] args) {
        Director director = new Director();
        Builder builder = new ConcreteBuilder();

        director.buildResult(builder);

        Product product = builder.getProducts();

        product.showProduct();
    }
}