左边树形菜单的生成，不是使用tree控件

如何定义一个递归使子节点添加到父节点中，加载角色的时候会把所有和它相关的权限都加载出来，数据库设计如下：

解决方案 »

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哦，不好意思，图片出错了，如下：
http://p6.images22.51img1.com/6000/typhoon365/6e5a28db2fdbf57f84565a8dddb40543.jpg
我是想定义一个方法，使得二级菜单.right_parent_code = 一级菜单.right_code 的所有二级菜单添加到一级菜单中，java的方法，最好是使用递归。
<%@ page language="java" pageEncoding="UTF-8"%><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic"%>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<link rel="stylesheet" type="text/css" href="/Czhd/theme/2/style.css">
<link rel="stylesheet" type="text/css" href="/Czhd/theme/2/menu.css"><html:html lang="true">
<head>
<html:base />
<title>菜单页</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is menu page">
 <c:set var="c_mmenu" value=""></c:set>
<c:set var="c_smenu" value=""></c:set>
<c:set var="i" value="0"></c:set>
<c:set var="k" value="0"></c:set>
</head>
<body class="panel">
<style>
A.applink:hover {border: 2px dotted #DCE6F4;padding:2px;background-color:#ffff00;color:green;text-decoration:none}
A.applink       {border: 2px dotted #DCE6F4;padding:2px;color:#2F5BFF;background:transparent;text-decoration:none}
A.info          {color:#2F5BFF;background:transparent;text-decoration:none}
A.info:hover    {color:green;background:transparent;text-decoration:underline}
</style>
<p align="center">
--主菜单--
</p>
<div id="body">

<a id="expand_link" href="javascript:menu_expand();"><u><span
id="expand_text">展开</span> </u> </a>
<ul id="menu">
<c:forEach items="${menus}" var="mmenu" varStatus="s">
<c:if test="${mmenu.menuGroupName != c_mmenu}" var="condition">
<c:set var="c_mmenu" value="${mmenu.menuGroupName}" />
<c:set var="i" value="${i+1}"></c:set>

<li class="L1">
<a href="javascript:c(m0${i});" id="m0${i}"><span><img
src="/Czhd/images/menu/em.gif" align="Middle"/>
${c_mmenu}</span> </a>
</li>
<ul id="m0${i}d" style="display:none;" class="U1">

<c:forEach items="${menus}" var="smenu">
<c:if test="${c_mmenu == smenu.menuGroupName}">
<c:set var="k" value="${k+1}"></c:set>
<li class="L22">
<a href="javascript:a('${smenu.url}','${i}${k}');"
id="f${i}${k}"><span><img
src="/Czhd/images/menu/url.gif" align="absMiddle" />
${smenu.menuName}</span></a>
</li>
</c:if>
</c:forEach>
</ul>
</c:if>
</c:forEach>
</ul>
</div>
<div id="bottom"></div>
<script language="JavaScript">
var cur_id="";
var flag=0,sflag=0;//-------- 菜单点击事件 -------
function c(srcelement)
{
  var targetid,srcelement,targetelement;
  var strbuf;  //-------- 如果点击了展开或收缩按钮---------
  targetid=srcelement.id+"d";
  targetelement=document.getElementById(targetid);  if (targetelement.style.display=="none")
  {
     srcelement.className="active";
     targetelement.style.display='';     menu_flag=0;
     expand_text.innerHTML="收缩";
  }
  else
  {
     srcelement.className="";
     targetelement.style.display="none";     menu_flag=1;
     expand_text.innerHTML="展开";
     var links=document.getElementsByTagName("A");
     for (i=0; i<links.length; i++)
     {
       srcelement=links[i];
       if(srcelement.parentNode.className.toUpperCase()=="L1" && srcelement.className=="active" && srcelement.id.substr(0,1)=="m")
       {
          menu_flag=0;
          expand_text.innerHTML="收缩";
          break;
       }
     }
  }
}
function set_current(id)
{
   cur_link=document.getElementById("f"+cur_id)
   if(cur_link)
      cur_link.className="";
   cur_link=document.getElementById("f"+id);
   if(cur_link)
      cur_link.className="active";
   cur_id=id;
}
//-------- 打开网址 -------
function a(URL,id)
{
   set_current(id);
   if(URL.substr(0,7)!="http://" && URL.substr(0,6)!="ftp://")
      URL = "/Czhd"+URL;
   parent.working_window.location=URL;
}
function b(URL,id)
{
   set_current(id);
   URL = "/app/"+URL;
    parent.openURL(URL,0);
}
function d(URL,id)
{
   set_current(id);
   URL = "/fis/"+URL;
    parent.openURL(URL,0);
}
//-------- 菜单全部展开/收缩 -------
var menu_flag=1;
function menu_expand()
{
  if(menu_flag==1)
     expand_text.innerHTML="收缩";
  else
     expand_text.innerHTML="展开";  menu_flag=1-menu_flag;  var links=document.getElementsByTagName("A");
  for (i=0; i<links.length; i++)
  {
    srcelement=links[i];
    if(srcelement.parentNode.className.toUpperCase()=="L1" || srcelement.parentNode.className.toUpperCase()=="L21")
    {
      targetelement=document.getElementById(srcelement.id+"d");
      if(menu_flag==0)
      {
        targetelement.style.display='';
        srcelement.className="active";
      }
      else
      {
        targetelement.style.display="none";
        srcelement.className="";
      }
    }
  }
}</script>
</body>
</html:html>