设计模式之四：简单工厂(披萨店生产披萨模拟流程)

简单工厂不是一个设计模式，只是一种变成习惯，常被误认为是“工厂模式”。(披萨店生产披萨模拟流程)

工程名称：SimpleFactory  下载目录：http://www.cnblogs.com/jrsmith/admin/Files.aspx ， SimpleFactory.zip

package com.jyu.pizza;

public abstract class Pizza {

    protected String name;
    
    public void prepare(){
        System.out.println(name+" is preparing...");
    }
    
    public void bake(){
        System.out.println(name+" is baking...");
    }
    
    public void cut(){
        System.out.println(name+" is cutting...");
    }
    
    public void box(){
        System.out.println(name+" is boxing...");
    }
    
}

package com.jyu.pizza;


/**
 * @author root
 *
 */
public class CheesePizza extends Pizza {
    
    public CheesePizza(){
        name = "CheesePizza";
    }

}

package com.jyu.pizza;

public class ClamPizza extends Pizza {

    public ClamPizza() {
        name = "ClamPizza";
    }

}

package com.jyu.pizza;

public class PepperoniPizza extends Pizza {

    public PepperoniPizza() {
        name = "PepperoniPizza";
    }

}

package com.jyu.pizza;

public class VeggiePizza extends Pizza {

    public VeggiePizza() {
        name = "VeggiePizza";
    }

}

package com.jyu.store;

import com.jyu.factory.SimplePizzaFactory;
import com.jyu.pizza.Pizza;

/**
 * 批萨店
 * @author root
 *
 */
public class PizzaStore {

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

package com.jyu.factory;

import com.jyu.pizza.CheesePizza;
import com.jyu.pizza.ClamPizza;
import com.jyu.pizza.PepperoniPizza;
import com.jyu.pizza.Pizza;
import com.jyu.pizza.VeggiePizza;

/**
 * 简单批萨工厂
 * @author root
 *
 */
public class SimplePizzaFactory {

    public Pizza createPizza(String type){
        Pizza pizza = null;
        
        if(type.equals("cheese")){
            pizza = new CheesePizza();
        }else if(type.equals("pepperoni")){
            pizza = new PepperoniPizza();
        }else if(type.equals("clam")){
            pizza = new ClamPizza();
        }else if(type.equals("veggie")){
            pizza = new VeggiePizza();
        }
        return pizza;
    }
}

package com.jyu.test;

import com.jyu.factory.SimplePizzaFactory;
import com.jyu.store.PizzaStore;

public class TestSimpleFactory {

    /**
     * @param args
     */
    public static void main(String[] args) {
        
        SimplePizzaFactory factory = new SimplePizzaFactory();
        
        PizzaStore pizzaStore = new PizzaStore(factory);
        
        pizzaStore.orderPizza("cheese");
    }

}