设计模式之原型模式

原型模式用原型实例指定创建对象的种类，并且通过拷贝这些原型创建对象。

一般在初始化的信息不发生变化的时候，克隆是最好的方法，隐藏的对象创建的细节，同时又能够提升性能。如果初始化类的时候时间比较长，New 多个类很占时间，使用原型模式可以节省开销。

原型模式实现：

class Prototype {

private $name = '';
private $age = 0;
private $sex = '';
private $experience = '';
//存储工作经历对象
private $ex = null;

public function __construct($name,$age,$sex)
{
    $this->name = $name;
    $this->age = $age;
    $this->sex = $sex;
    $this->ex = new Experience();
}

public function setExperience($time,$company)
{
    // $this->experience = $experience;
    $this->ex->_set('time',$time);
    $this->ex->_set('company',$company);
}

public function showProfile()
{
    echo 'Name:'.$this->name.'<br>';
    echo 'Age:'.$this->age.'<br>';
    echo 'Sex:'.$this->sex.'<br>';
    echo 'Experience:'.$this->ex->_get('time').','.$this->ex->_get('company').'<br>';
}
}

class Experience{

private $time = '';
private $company = '';

public function _set($name,$value)
{   
    $this->$name = $value;
}

public function _get($name){
    return $this->$name;
} 
}

客户端代码：

$prototype = new Prototype('test','23','male');
$prototype->setExperience('2000','出生');
$prototype->showProfile();

$prototype1 = clone $prototype;
$prototype1->setExperience('2005','毕业');
$prototype1->showProfile();

结果：

Name:test
Age:23
Sex:male
Experience:2000,出生
Name:test
Age:23
Sex:male
Experience:2005,毕业