Java中的23种设计模式之——生成器（Builder）模式（5）

定义：将一个复杂的对象，分成多分，使同样的构建过程，能有不同的表示，这样的设计模式被称为建造者模式。

生成器（Bulider）模式---对象创建模式
* 将一个复杂对象的构建与它的表示分离，使得同样的构建过程可以创建不同的表示。

public class Bulider {
    public static void main(String[] args) {
        Waiter waiter = new Waiter();
        PizzaBulider hawailian_pizzaBulider = new HawailianPizzaBulider();
        //PizzaBulider spicy_pizzaBulider = new SpicyPizzaBuilder();
        waiter.setPizzaBulider(hawailian_pizzaBulider);
        //waiter.setPizzaBulider(spicy_pizzaBulider);//同样的构建，不一样的表示
        waiter.construct();
        System.out.println("pizza:"+waiter.getPizza());
    }
}

class Pizza {
    private String parts;

    public void setParts(String parts) {
        this.parts = parts;
    }
    public String toString(){
        return this.parts;
    }
}
abstract class PizzaBulider{
    protected Pizza pizza;
    public Pizza getPizza(){
        return pizza;
    }
    public void createNewPizza(){
        pizza = new Pizza();
    }
    public abstract void buildParts();
}
class HawailianPizzaBulider extends PizzaBulider{

    @Override
    public void buildParts() {
        pizza.setParts("cross + mild+han&pineapple");
    }
}
class SpicyPizzaBuilder extends PizzaBulider{

    @Override
    public void buildParts() {
        pizza.setParts("pan bake + hot+pepperoni&salami");
    }
}
class Waiter{
    private PizzaBulider pizzaBulider;
    public void setPizzaBulider(PizzaBulider pizzaBulider){//设置构造器
        this.pizzaBulider = pizzaBulider;
    }
    public Pizza getPizza(){
        return pizzaBulider.getPizza();
    }
    public void construct(){//构建
        pizzaBulider.createNewPizza();
        pizzaBulider.buildParts();
    }
}