html部分
1     <select name="mateBelongZ" id="mateBelongZID"  style="width:142px;height:20px;font-size:13px;border:1px solid teal">

      </select>

     $.ajax({

         url : rootPath+'/jasframework/ycsy/queryCameraBelongZID.do?',

         success : function(result) {

                 var seHtml = "";

                 for(var i = 0 ;i<result.length; i++) {

                     seHtml += "<option>"+result[i].text+"</option>";

                 }

                 $("#mateBelongZID").html(seHtml);

         },

         async : true,

         dataType : "json"

     });

    $("#mateBelongZID").combobox({

        url : rootPath+'/jasframework/ycsy/queryCameraBelongZID.do?',

        valueField:'id',

        textField:'text'

    });

    //调整选择下拉框的宽度

    setComboObjWidth("mateBelongCID","0.44","combobox");

    setComboObjWidth("mateBelongZID","0.44","combobox");

Controller层

/**

     * 查询摄像头所属的占

     * @return

     */

    @RequestMapping("/queryCameraBelongZID")

    @ResponseBody

    public List queryCameraBelongZID(HttpServletRequest request){

        // 把登录用户信息推送到业务类

        List<?> list = cameraInfoService.queryCameraBelongZID();

        return list;

    }

service层

/**

 * 查询摄像头所属的站

 */

    @Override

    public List queryCameraBelongZID() {

        // TODO Auto-generated method stub

        String sql = "from   VectorInfo  where   parenteventid = 202 ";

//        String sql = "select * from   YCSY_VectorInfo where   parenteventid = 202  vectorname is null    and  workareaname like '%站' and parenteventid !=14";

        List<VectorInfo> list = workareaInfoDao.queryCameraBelongZID(sql);

        List list1 = new ArrayList();

        for(VectorInfo  CameraInfo: list){

            Map<String,String> map= new HashMap<String,String>();

            map.put("id", CameraInfo.getWorkareaName());

            map.put("text",  CameraInfo.getWorkareaName());

            list1.add(map);

        }

        return list1;

    }

     $.ajax({

         url : strUrl,

         success : function(result) {

 //            alert(result);

             if(result==null){

                 alert("抱歉,所选区域的井暂无层位信息！");

             }else{

                 var res = result;

                 var arr = res.split(",");

                 var seHtml = "";

                 for(var val in arr) {

                     seHtml += "<option>"+arr[val]+"</option>";

                 }

                 $("#cengwei").html(seHtml);

             }

 //             $("ol").append("<li>Appended item</li>");

         },

         async : true,

         dataType : "text"

     });

 <td>

      <select id="cengwei" style="border:1px solid teal;" >

 <!--         <option>所有层位</option> -->

     </select> 

     /**

      * get 所有生产层位信息

      *

      * @throws IOException

      */

     @RequestMapping("/getAllCengwei")

     @ResponseBody

     public void getAllCengwei(HttpServletRequest request, HttpServletResponse response) throws IOException {

         String wellNames=request.getParameter("wellNames");

         String str="";

         if(wellNames!=null && !"".equals(wellNames)){

             wellNames=EncodeUtil.urlDecode(wellNames);

             String[] wellName=wellNames.split(";");

             for(int i=0;i<wellName.length;i++){

                 str+="'"+wellName[i]+"',";

             }

         }

         String  sql  = "select distinct(cw)cw from  ycsy_newhorizon t where t.Cw  is not Null ";

         if(str!=null && !"".equals(str)){

             sql +="and t.jh in("+str.substring(0, str.length()-1)+") ";

         }

         List list = workareaInfoService.getAllCengwei(sql);

         String cengwei = "";

         for (Iterator iterator = list.iterator(); iterator.hasNext();) {

             String obj = (String) iterator.next();

             cengwei += obj + ",";

         }

         if(cengwei!=null && !"".equals(cengwei)){

             cengwei = cengwei.substring(0,cengwei.length()-1);

         }

         response.setCharacterEncoding("utf-8");

         response.getWriter().write("所有层位," + cengwei);

     }