用jquery生成二级菜单的实例代码

                            <s:select id=’_channel’ list=”channelList” listKey=”channelId”
                                listValue=”channelName” 
                                key=”article.subChannel.channel.channelId”
                                onchange=”querySub(this.value)”></s:select>
                          </td>
                 </tr>
                 <tr>
                    <th>二级栏目</th>
                          <td valign=”middle”>
                          <s:select name=’article.subChannel.subId’ list=”{}” headerKey=”” headerValue=”-请选择-“></s:select>
                          <!–<s:property value=”article.subChannel.subName”/>
                          –></td>
                 </tr>

服务器端

 public String querySubChannelArticle(){ 
        HttpServletResponse response=getResponse();
        HttpServletRequest request=getRequest();
        response.setContentType(“application/json; charset=UTF-8”);
        PrintWriter out =null;
        try {