设计模式之工厂模式 - JAVA

zzaStore { protected Pizza createPizza(String item) { Pizza pizza = null; PizzaIngredientFactory ingredientFactory = new NYPizzaIngredientFactory(); if (item.equals("cheese")) { pizza = new CheesePizza(ingredientFactory); pizza.setName("New York Style Cheese Pizza"); } else if (item.equals("veggie")) { pizza = new VeggiePizza(ingredientFactory); pizza.setName("New York Style Veggie Pizza"); } else if (item.equals("clam")) { pizza = new ClamPizza(ingredientFactory); pizza.setName("New York Style Clam Pizza"); } else if (item.equals("pepperoni")) { pizza = new PepperoniPizza(ingredientFactory); pizza.setName("New York Style Pepperoni Pizza"); } return pizza; } }
其他类不列出，测试类如下：

package headfirst.factory.pizzaaf;

public class PizzaTestDrive {
 
	public static void main(String[] args) {
		PizzaStore nyStore = new NYPizzaStore();
		PizzaStore chicagoStore = new ChicagoPizzaStore();
 
		Pizza pizza = nyStore.orderPizza("cheese");
		System.out.println("Ethan ordered a " + pizza + "\n");
 
		pizza = chicagoStore.orderPizza("cheese");
		System.out.println("Joel ordered a " + pizza + "\n");

		pizza = nyStore.orderPizza("clam");
		System.out.println("Ethan ordered a " + pizza + "\n");
 
		pizza = chicagoStore.orderPizza("clam");
		System.out.println("Joel ordered a " + pizza + "\n");

		pizza = nyStore.orderPizza("pepperoni");
		System.out.println("Ethan ordered a " + pizza + "\n");
 
		pizza = chicagoStore.orderPizza("pepperoni");
		System.out.println("Joel ordered a " + pizza + "\n");

		pizza = nyStore.orderPizza("veggie");
		System.out.println("Ethan ordered a " + pizza + "\n");
 
		pizza = chicagoStore.orderPizza("veggie");
		System.out.println("Joel ordered a " + pizza + "\n");
	}
}

设计模式之工厂模式(三)