主要思路:首先看第三行和第四行,父类ID(PARENTID)的值是1,表示属于id=1这个类的子类,而一,二两行因为是一级分类,没有上级分类,所以父类ID(PARENTID)的值是0,表示初级分类,依次类推便实现了无限级分类,最终的效果是:
- ├一级分类A
- ├─┴二级分类A
- ├─┴二级分类B
- ├一级分类B
然后就是程序,这里以PHP作为描述语言,可以很方便的改成其他语言,因为原理相似,就是一个递归而已,代码如下:
- <?php
- $dbhost = "localhost";
- $dbuser = "root";
- $dbpd = "123456";
- $dbname = "test";
- mysql_connect($dbhost,$dbuser,$dbpd);
- mysql_select_db($dbname);
- mysql_query("SET NAMES 'utf8'");
- display_tree("├",0);
- function display_tree($tag,$classid) {
- $result = mysql_query("
- SELECT *
- FROM ylmf_class
- WHERE parentid = '" . $classid . "'
- ;"
- );
- while ($row = mysql_fetch_array($result)) {
-
- echo $tag.$row['classname'] . "<br/>";
-
- display_tree($tag."─┴",$row['id']);
- }
- }
- ?>
在表格中显示TreeTable通过对单元格的行合并和列合并实现了无限层级也能较好的展示层级架构.
1.构建ID/PID/NAME的数组,后期可通过数据库生成的动态数据,代码如下:
- array(
- * 1 => array('id'=>'1','parentid'=>0,'name'=>'一级栏目一'),
- * 2 => array('id'=>'2','parentid'=>0,'name'=>'一级栏目二'),
- * 3 => array('id'=>'3','parentid'=>1,'name'=>'二级栏目一'),
- * 4 => array('id'=>'4','parentid'=>1,'name'=>'二级栏目二'),
- * 5 => array('id'=>'5','parentid'=>2,'name'=>'二级栏目三'),
- * 6 => array('id'=>'6','parentid'=>3,'name'=>'三级栏目一'),
- * 7 => array('id'=>'7','parentid'=>3,'name'=>'三级栏目二')
- * )
2. 导入TreeTable类库,代码如下:
import('@.ORG.Util.TableTree'); //Thinkphp导入方法
3. 生成TreeTable HTML代码
$treeTable->init($treearr);
echo $treeTable->get_treetable();
注意:get_treetable()只生产表体部门,<TALBE></TABLE>请自行构建.
php完整代码如下:
- <?php
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- class TreeTable {
-
-
-
-
- public $arr = array();
-
-
-
-
- public $columns = 0;
-
-
-
-
- public $rows = 0;
-
-
-
-
-
-
-
-
-
-
-
-
-
- public function init($arr=array()){
- if(!is_array($arr)) return false;
- foreach ($arr as $k=>$v) {
- $this->arr[$v['id']] = $v;
- }
- foreach ($this->arr as $k => $v){
- $this->arr[$k]['column'] = $this->get_level($v['id']);
- $this->arr[$k]['arrchildid'] = $this->get_arrchildid($v['id']);
- $this->arr[$k]['arrparentid'] = $this->get_arrparentid($v['id']);
- $this->arr[$k]['child_bottom_num'] = $this->get_child_count($v['id']);
- }
- $this->columns = $this->get_columns();
- $this->rows = $this->get_rows();
-
- $this->sort_arr();
- foreach ($this->arr as $k => $v){
- $this->arr[$k]['row'] = $this->get_row_location($v['id']);
- $this->arr[$k]['rowspan'] = $v['child_bottom_num'];
- $this->arr[$k]['colspan'] = $v['child_bottom_num'] == 0 ? $this->columns - $v['column'] + 1 : 0;
- }
- return $this->get_tree_arr();
- }
-
-
-
- public function get_tree_arr(){
- return is_array($this->arr) ? $this->arr : false;
- }
-
-
-
- public function sort_arr(){
-
- foreach ($this->arr as $k => $v){
- $order_pid_arr[$k] = $v['arrparentid'];
- $order_iscost[] = $v['sort'];
- $order_id_arr[$k] = $v['id'];
- }
-
- array_multisort(
- $order_pid_arr, SORT_ASC, SORT_STRING,
- $order_iscost, SORT_DESC, SORT_NUMERIC,
- $order_id_arr, SORT_ASC, SORT_NUMERIC,
- $this->arr);
-
- for ($column = 1; $column <= $this->columns; $column++) {
- $row_level = 0;
- foreach ($this->arr as $key => $node){
- if ($node['column'] == $column){
- $row_level++;
- $this->arr[$key]['column_level'] = $row_level;
- }
- }
- }
-
- foreach ($this->arr as $k=>$v) {
- $arr[$v['id']] = $v;
- }
- $this->arr = $arr;
- }
-
-
-
-
-
- public function get_parent($myid){
- $newarr = array();
- if(!isset($this->arr[$myid])) return false;
- $pid = $this->arr[$myid]['parentid'];
- $pid = $this->arr[$pid]['parentid'];
- if(is_array($this->arr)){
- foreach($this->arr as $id => $a){
- if($a['parentid'] == $pid) $newarr[$id] = $a;
- }
- }
- return $newarr;
- }
-
-
-
-
-
- public function get_child($myid){
- $a = $newarr = array();
- if(is_array($this->arr)){
- foreach($this->arr as $id => $a){
- if($a['parentid'] == $myid) $newarr[$id] = $a;
- }
- }
- return $newarr ? $newarr : false;
- }
-
-
-
-
- public function get_level($myid, $init = true){
- static $level = 1;
- if($init) $level = 1;
- if ($this->arr[$myid]['parentid']) {
- $level++;
- $this->get_level($this->arr[$myid]['parentid'], false);
- }
- return $level;
- }
-
-
-
-
-
- public function get_child_count($myid, $init = true){
- static $count = 0;
- if($init) $count = 0;
- if(!$this->get_child($myid) && $init) return 0;
- if($childarr = $this->get_child($myid)){
- foreach ($childarr as $v){
- $this->get_child_count($v['id'], false);
- }
- }else{
- $count++;
- }
- return $count;
- }
-
-
-
-
-
- public function get_arrchildid($myid, $init = true) {
- static $childid;
- if($init) $childid = '';
- if(!is_array($this->arr)) return false;
- foreach($this->arr as $id => $a){
- if($a['parentid'] == $myid) {
- $childid = $childid ? $childid.','.$a['id'] : $a['id'];
- $this->get_arrchildid($a['id'], false);
- }
- }
- return $childid ;
- }
-
-
-
-
- public function get_arrparentid($id, $arrparentid = '') {
- if(!is_array($this->arr)) return false;
- $parentid = $this->arr[$id]['parentid'];
- if($parentid > 0) $arrparentid = $arrparentid ? $parentid.','.$arrparentid : $parentid;
- if($parentid) $arrparentid = $this->get_arrparentid($parentid, $arrparentid);
- return $arrparentid;
- }
-
-
-
-
- public function get_row_location($myid){
- $nodearr = $this->arr;
-
- foreach ($nodearr as $key => $node){
- if($myid == $node['id']) {
- $node_row_count = 0;
- $arrparentid = explode(',', $node['arrparentid']);
-
- foreach ($arrparentid as $pid){
- foreach ($nodearr as $node_row){
- if($node_row['column'] == $nodearr[$pid]['column'] && $nodearr[$pid]['column_level'] > $node_row['column_level'] && $node_row['child_bottom_num'] == 0){
- $node_row_count ++;
- }
- }
- }
-
- foreach ($nodearr as $node_row){
- if($node['column'] == $node_row['column'] && $node_row['column_level'] < $node['column_level']){
- $node_row_count += $node_row['child_bottom_num'] ? $node_row['child_bottom_num'] : 1;
- }
- }
- $node_row_count++;
- break;
- }
- }
- return $node_row_count;
- }
-
-
-
- public function get_rows(){
- $row = 0;
- foreach ($this->arr as $key => $node){
- if($node['child_bottom_num'] == 0){
- $rows++;
- }
- }
- return $rows;
- }
-
-
-
- public function get_columns(){
- $columns = 0 ;
- foreach ($this->arr as $key => $node){
- if($node['column'] > $columns){
- $columns = $node['column'];
- }
- }
- return $columns;
- }
-
-
-
- public function get_treetable(){
- $table_string = '';
- for($row = 1; $row <= $this->rows; $row++){
- $table_string .= "rt<tr>";
- foreach ($this->arr as $v){
- if($v['row'] == $row){
- $rowspan = $v['rowspan'] ? "rowspan='{$v['rowspan']}'" : '';
- $colspan = $v['colspan'] ? "colspan='{$v['colspan']}'" : '';
- $table_string .= "rtt<td {$rowspan} {$colspan}>
- {$v['name']}
- </td>";
- }
- }
- $table_string .= "rt</tr>";
- }
- return $table_string;
- }
- }
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