界面存在多个easyUI Combobox控件时，加载数据失败，或加载不正确

<td>处理类型:</td>
 <td><input id="handleType" name="handleType" panelHeight="auto" class="easyui-combobox"
        style="width: 110px;"
        data-options="editable : false,
        onShowPanel : function(){
           var s=$(this).combobox(‘getData‘);
           if(s.length==0){
              $(this).combobox(‘options‘).url=projectPath+‘TDataDictController/loadAccountErrHandleType.do‘;
              $(this).combobox(‘reload‘);
           }
        },
        valueField:‘itemVal‘,
        textField:‘colNameCn‘">
</td>

@RequestMapping("loadDataDict.do")
    @ResponseBody
    public void loadAccountErrHandleType(TYwDataDictVo vo, HttpServletRequest request,HttpServletResponse response) {
        try {
            this.writeJson(tDataDictService.loadDataDict(vo,request),response);
        } catch (Exception e) {
            log.error("数据字典查询失败,{}", e);
        }
    }

/**
     * 将对象转换为json格式并输出
     * @param obj
     */
    public void writeJson(Object obj,HttpServletResponse response){
        Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd").create();
        response.setContentType("text/html; charset=utf-8");
        PrintWriter out = null;
        try{
            out = response.getWriter();
            out.println(JSON.toJSONStringWithDateFormat(obj, "yyyy-MM-dd"));
        }catch(IOException e){
            log.error("IO异常,{}",e);
        } finally{
            out.flush();
            out.close();
        }

    }