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组合模式应用于递归结构的优化或分层数据结构的管理：
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abstract class Compary
{
protected $name;
/* public function __construct($name)
{
$this->name=$name;
} */
abstract public function Add(Compary $compary);
abstract public function Move(Compary $compary);
abstract public function Display($level=0);
}
class SubCompary extends Compary
{
private $subcompary=array();
//protected $name;
public function __construct($name)
{
//parent::$name=$name;
$this->name=$name;
}
public function Add(Compary $compary)
{
if(!$compary)
{
return false;
}
$key=array_search($compary,$this->subcompary);
if($key===false)
{
$this->subcompary[]=$compary;
}
return true;
}
public function Move(Compary $compary)
{
if(!$compary)
{
return false;
}
$key=array_search($compary,$this->subcompary);
if($key!==false)
{
unset($this->subcompary[$key]);
}
return true;
}
public function Display($level=0)
{
//输出本节点的名称
if($this->name)
{
$pre='';
for($i=0;$i<$level;$i++)
{
$pre.='-';
}
echo $pre.$this->name.'
';
}
//按层次输出每个分层的节点的名称
if(is_array($this->subcompary))
{
foreach($this->subcompary as $key => $value )
{
//递归输出每层的节点名称
//递归输出每层的节点名称
$value->Display($level+2);
}
}
else
{
}
}
}
class Department extends Compary
{
private $department=array();
//protected $name;
public function __construct($name)
{
//parent::$name=$name;
$this->name=$name;
}
public function Add(Compary $compary)
{
/* if(!$compary)
{
return false;
}
$key=array_search($compary,$this->dapartment);
if($key===false)
{
$this->dapartment[]=$compaty;
return true;
}
else
{
return false;
} */
echo '叶子节点不能增加节点！';
}
public function Move(Compary $compary)
{
/* if(!$compary)
{
return false;
}
$key=array_search($compary,$this->department);
if($key!==false)
{
unset($this->department[$key]);
return true;
}
else
{
return false;
} */
echo '叶子节点不能删除节点！';
}
public function Display($level=0)
{
if(!$this->name)
{
return false;
}
$pre='';
for($i=0;$i<$level;$i++)
{
$pre.='-';
}
echo $pre.$this->name.'
';
/* if(is_array($this->department))
{
foreach($this->department as $key => $value )
{
$value->Display($level+2);
}
}
else
{
return false;
} */
}
}
header('content-type:text/html;charset=utf-8');
$subcompary=new SubCompary('北京公司');
$subcompary->Add(new Department('总公司财务部'));
$subcompary->Add(new Department('总公司技术部'));
$shanghai=new SubCompary('上海分公司');
$shanghai->Add(new Department('上海分公司技术部'));
$shanghai->Add(new Department('上海分公司财务部'));
$subcompary->Add($shanghai);
$subcompary->Display(2);
?>