设计模式之六——组合模式

      过两天就要过年了，今年的经济不好，影响到我的口袋，最鼠年的最后两天再做点事吧。忙中偷闲来写一个设计模式，

 

组合模式，主要是一个树型

先写一个抽像类component.php

<?phpabstract class component {public $name;function __construct($name) {$this->name=$name;}abstract public function add($component);abstract public function remove($component);public function say($word){echo " this is component";}}?>

再写一些枝节点类composite.php，继承componenet

 <?phpinclude 'component.php';class composite extends component {function __construct($name) {parent::__construct($name);}function add($component){if ($component instanceof component ){echo "<br>新建一个叶节点".$component->name;}else{echo "<br>新建一个子节点".$component->name;}}function remove($component){echo "<br>移除一个节点".$component->name;}public function say($word){echo "<br>I am {$this->name},{$word}<br> ";}}?>

再写一个叶节点类leaf.php这个类已是叶节点了，add和remove函数就没用了，写个空吧

<?phprequire_once ('component.php');class leaf extends component {function __construct($name) {parent::__construct($name);}function add($componentName){return false;}function remove($component){return false;}public function say($word){echo "<br>I am {$this->name},{$word}<br>";}}?>

 

然后就是编写客户端了main.php

<?phpinclude 'Composite.php';include 'leaf.php';$china=new composite('中华人民共和国');$china->say('我要增加一个省份,叫广东省');$guangdong=new composite('广东省');$china->add($guangdong);$guangdong->say('我要增加一个广州市');$guangzhou=new composite('广州市');$guangdong->add($guangzhou);$guangzhou->say('我要增加一个花都区，这个是最低一级行政区');$huadu=new leaf('花都');$guangzhou->add($huadu);$huadu->say('我是最后一级的了');?>

 

今天在10.37和10.38两个价位分别买了100股中国石油，拿油过年。希望过了年中石油会到16元。