php设计模式_简单工厂

来源：互联网发布：linux终端选项编辑：程序博客网时间：2024/05/18 00:18

<?phpclass PizzaA {    public function __construct () {        print_r('create PizzaA instance');    }       public function cook () {        print_r('cooking pizza!');    }       public function box () {        print_r('boxing pizza!');    }   }

<?phpclass PizzaB {    public function __construct () {        print_r('create PizzaB instance');    }       public function cook () {        print_r('cooking pizza!');    }       public function box () {        print_r('boxing pizza!');    }   }

<?phpclass PizzaStore {        public function __construct (SimplePizzaFactory $pizzaFactory) {        $this->factory = $pizzaFactory;    }       public function orderPizza ($type) {        $pizza = $this->factory->createPizza($type);            $pizza->cook();        $pizza->box();    }   }

<?phprequire 'PizzaA.php';require 'PizzaB.php';class SimplePizzaFactory {    public function createPizza ($type) {        $pizza = '';         if ($type == 'PizzaA') {            $pizza = new PizzaA();        } elseif ($type == 'PizzaB') {            $pizza = new PizzaB();        }           return $pizza;    }   }

<?phprequire 'PizzaStore.php';require 'SimplePizzaFactory.php';$factory = new SimplePizzaFactory();$p_store = new PizzaStore($factory);$p_store->orderPizza('PizzaA');

说明：抽象一个披萨工厂的类专门用来处理生产各种披萨生产完毕送到披萨商店当然这个时候披萨商店要拿到披萨的实例，然后执行披萨自己的一系列操作

工厂方法模式定义了一个创建对象的接口，但由子类决定要实例化的类是哪一个，工厂方法让类把实例化推迟到子类

阅读全文

0 0