namespace Home/Model;use Think/Model;class AccountModel extends Model{　　public function getTreeList(){    $data = $this->field('id,code,name,islast')->select();   foreach($data as &$v){　　　　　　　 //這里加入了元素pid，用來標識父級id的　　　   $len = strlen($v['code']);   if($len == 3){　　　　　　　　　　//這里假設長度為3位的科目編碼是一級,5位為二級科目，7位為三級，以此類推    $v['pid'] = 0;    } else {    $v['pid'] = substr($v['code'],0,$len-2);    }    }  return $this->createTree($data); //生成ComboTree所需的數據結構 }  //遞歸的方式生成子樹 private function createSubTree($data,$pid){  $tree = array();  foreach($data as $k=>$v){   if($v['pid'] == $pid){    $newDate = array(     'id' => $v['id'],     'text'=>$v['name'],     'state'=>($v['islast'] != 1)?'closed':'open'    );     if($v['islast'] != 1){　　　　　　　　//如果不是末級科目調用自身生成子數據     $subData = $this->createSubTree($data,$v['code']);     if(!empty($subData)){      $newDate['children'] = $subData;       }    }    array_push($tree,$newDate);   }     }   return $tree; }  //生成樹,先從一級會計科目分類開始創建樹形菜單數據 private function createTree($data){    $ret = array();  foreach($data as $k => $v){   if($v['pid'] == 0){    $newDate = array(  //創建為ComboTree能夠識別的格式，這里我沒有更好的辦法了，只能這樣處理     'id' => $v['id'],     'text'=>$v['name'],     'state'=>'closed'    );     $subData = $this->createSubTree($data,$v['code']);    if(!empty($subData)){     $newDate['children'] = $subData;      }    $ret[] = $newDate;    }      }  return $ret; }  }