工厂方法模式--简单工厂模式--抽象工厂模式

1.工厂方法模式。定义一个用于创建对象的接口，让子类决定实例化哪一个类。工厂方法是一个类的实例化延迟到其子类。

工厂方法模式类结构图：

实现：

<?php
//抽象产品类
abstract class AbstractProduct{
    //共有的方法
    public function common(){

    }
    public abstract function behavior();
}
//具体产品类
class ConcreteProduct1 extends AbstractProduct{
    public function behavior(){
        echo "doing what product1 should do!\n";
    }
}
class ConcreteProduct2 extends AbstractProduct{
    public function behavior(){
        echo "I just doing what product2 should do!\n";
    }
}

//抽象工厂类
abstract class AbstractCreator{
    public abstract function createProduct($productname);
}
//具体工厂类
class ConcreteCreate extends AbstractCreator{
    public function createProduct($productname){
        try{
            $product = new ReflectionClass($productname);
            $instance = $product->newInstanceArgs();
            //$instance->behavior();
            return $instance;
        }catch(LogicException $e){
           die("Not gonna make it in here...\n");
        }catch(ReflectionException $e){
           die("Your class does not exist!\n");
        }
    }
}
//场景类
class Client{
    public function gene(){
        $creator = new ConcreteCreate();
        $product1 = $creator->createProduct("ConcreteProduct1");
        $product1->behavior();
        $product2 = $creator->createProduct("ConcreteProduct2");
        $product2->behavior();
    }
}

Client::gene();

2.简单工厂模式。又叫做静态工厂方法（Static Factory Method）模式。简单工厂模式是由一个工厂对象决定创建出哪一种产品类的实例。

　　简单工厂模式类结构图：

实现代码，只在工厂方法模式做小的修改即可。

<?php
//抽象产品类
abstract class AbstractProduct{
    //共有的方法
    public function common(){

    }
    public abstract function behavior();
}
//具体产品类
class ConcreteProduct1 extends AbstractProduct{
    public function behavior(){
        echo "doing what product1 should do!\n";
    }
}
class ConcreteProduct2 extends AbstractProduct{
    public function behavior(){
        echo "I just doing what product2 should do!\n";
    }
}

//简单工厂类
class simpleCreator{
    public function createProduct($productname){
        try{
            $product = new ReflectionClass($productname);
            $instance = $product->newInstanceArgs();
            //$instance->behavior();
            return $instance;
        }catch(LogicException $e){
           die("Not gonna make it in here...\n");
        }catch(ReflectionException $e){
           die("Your class does not exist!\n");
        }
    }
}
//场景类
class Client{
    public function gene(){
        $creator = new simpleCreator();
        $product1 = $creator->createProduct("ConcreteProduct1");
        $product1->behavior();
        $product2 = $creator->createProduct("ConcreteProduct2");
        $product2->behavior();
    }
}

Client::gene();

3.抽象工厂模式。为创建一组相关或相互依赖的对象提供一个接口，而且无须指定它们的具体类。

php代码实现：

<?php
//抽象产品类A
abstract class AbstractProductA{
    //共有的方法
    public function common(){

    }
    public abstract function behavior();
}
//具体产品类A
class ConcreteProductA1 extends AbstractProductA{
    public function behavior(){
        echo "doing what product1 should do!\n";
    }
}
class ConcreteProductA2 extends AbstractProductA{
    public function behavior(){
        echo "I just doing what product2 should do!\n";
    }
}

//抽象产品类B
abstract class AbstractProductB{
    //共有的方法
    public function common(){

    }
    public abstract function bdosomething();
}
//具体产品类B
class ConcreteProductB1 extends AbstractProductB{
    public function bdosomething(){
        echo "b....1!\n";
    }
}
class ConcreteProductB2 extends AbstractProductB{
    public function bdosomething(){
        echo "b......2!\n";
    }
}
//抽象工厂类
abstract class AbstractCreator{
    public abstract function createProductA();
    public abstract function createProductB();
}
//具体工厂类
class ConcreteCreator1 extends AbstractCreator{
    public function createProductA(){
            return (new ConcreteProductA1());
    }
    public function createProductB(){
            return (new ConcreteProductB1());
    }
}
class ConcreteCreator2 extends AbstractCreator{
    public function createProductA(){
            return (new ConcreteProductA2());
    }
    public function createProductB(){
            return (new ConcreteProductB2());
    }
}
//场景类
class Client{
    public function gene(){
        $creator1 = new ConcreteCreator1();
        $productA1 = $creator1->createProductA();
        $productB1 = $creator1->createProductB();
        $creator2 = new ConcreteCreator2();
        $productA2 = $creator2->createProductA();
        $productB2 = $creator2->createProductB();
        $productB2->bdosomething();
    }
}

Client::gene();