标签：func fun www ble 对象 eal level end dea
责任链模式：
请求方发起请求，接收方接受请求，并解决请求方的问题，如果接收方不能解决问题，则将请求传给下一个接收方（上一级），让下一个接收方来解决问题，以此类推，发起请求方并不关心是谁解决了问题，只关心是否解决了问题。
<?php
class Admin{
public $top="";
public $level=0;
public function __construct(){ }
public function ToDo(){}
public function deal($level){
if($level <= $this->level){
//如果当前类能够解决问题，则直接让当前类解决，不用传递给上级
$this->ToDo();
} else {
//如果当前类的等级不够（不能解决问题），则将问题传递给上一级
//即生成一个上级类，然后调用上级类的方法来解决问题，层层深入，直到解决问题
//top属性初始为上级类名
//将新生成的上级类的实例化对象赋给top属性
$this->top= new $this->top;
$this->top->deal($level);
}
}
}
class PersonOne extends Admin{
public $level=1;
public $top="PersonTwo";
public function ToDo(){
echo "the problem has been solved by PersonOne\n";
}
}
class PersonTwo extends Admin{
public $level=2;
public $top="PersonThree";
public function ToDo(){
echo "the problem has been solved by PersonTwo\n";
}
}
class PersonThree extends Admin{
public $level=3;
public $top=__CLASS__;
public function ToDo(){
echo "the problem has been solved by PersonThree\n";
}
}
$level=1;
$d=new PersonOne();
$d->deal($level);
$level=2;
$d=new PersonOne();
$d->deal($level);
$level=3;
$d=new PersonOne();
$d->deal($level);
?>
参考 责任链 | 菜鸟教程 http://www.runoob.com/design-pattern/chain-of-responsibility-pattern.html
标签：func fun www ble 对象 eal level end dea
原文地址：http://www.cnblogs.com/-beyond/p/7746948.html
