Ext请求过程中jsonArray的使用方式

    /***     * 取得用户组     * 根据不同的用户组类型取得用户组     * @param request request     * @param response response     */    @RequestMapping(value = "/getUserGroup")    public void getUserGroup(HttpServletRequest request,            HttpServletResponse response)    {        setSysVersion(request);        List<Map<String, Object>> list = null;        String groupType = request.getParameter("groupType");        String groupValue = request.getParameter("groupValue");        if (groupType != null && groupValue != null)        {            list = applicationDao.getUserGroup(groupType,groupValue);        }        else if (groupType != null)        {            list = applicationDao.getUserGroup(groupType);        }        JSONArray jsonObj = JSONArray.fromObject(list);                try        {            //向前台写数据            response.getWriter().write(jsonObj.toString());        }        catch (IOException e)        {            logger.error("com.ecm.huawei.smartcare.subscriberAnalysis.getUserGroup"                    + e);        }    }

Ext.Ajax.request({url: userGroupUrl,params:{groupType:this.getType(),groupValue:inputValue},async : false,success: function(response) {if(response.responseText == ""){isExist = false;}else if(Ext.util.JSON.decode(response.responseText)[0].SUBGROUP == inputValue){isExist = true;}else{isExist = false;}}})