设计模式3-简单工厂模式

佚名 6年前 (2019-04-17) 随笔 1855人围观抢沙发百度已收录

package DesignPattern;

public class SimpleFactoryPattern {
    public static class Pizza{
        public String type="Pizza";
        public void prepare(){}
        public void bake(){}
        public void cut(){}
        public void box(){}
    }

    public static class CheesePizza extends Pizza{
        CheesePizza(){
            this.type="cheesePizza";
        }
    }

    public static class PeperonPizza extends Pizza{
        PeperonPizza(){
            this.type="peperonPizza";
        }
    }

    public static class PizzaStore{
        SimpleFactory factory;
        public PizzaStore(SimpleFactory factory){
            this.factory=factory;
        }
        public Pizza orderPizza(String type){
            Pizza pizza=SimpleFactory.createPizza(type);
            pizza.prepare();
            pizza.bake();
            pizza.cut();
            pizza.box();
            return pizza;
        }
    }

    public static class SimpleFactory{
        public static Pizza createPizza(String type){
            Pizza pizza = null;
            if (type.equals("cheese")){
                pizza= new CheesePizza();
            }
            else if(type.equals("pepperoni")){
                pizza= new PeperonPizza();
            }
            return pizza;
        }
    }
    //简单工厂更像是一种编码风格，只是简单的将复杂的创建方法独立出来放在简单工厂里
    //适用于复杂的创建过程，一致的加工流程
    public static void main(String[] args) {
        SimpleFactory simpleFactory = new SimpleFactory();
        PizzaStore pizzaStore = new PizzaStore(simpleFactory);
        Pizza cheesePizza = pizzaStore.orderPizza("cheese");
        System.out.println(cheesePizza.type);
    }
}