public static void main(String[] args) {        //客户端json方式访问服务端        JSONObject json = new JSONObject();        json.put("vin", "FX003054");        String result = AdvancedUtil.httpTextRequest("http://localhost:8080/ECMS/maintainRecord/inspection", null, "POST", json.toString(), null);        System.out.println(result);                //取得json返回值        String a = "{\"carlist\":[{\"carno\":\"FX003905\"},{\"carno\":\"FF\"}],\"retval\":1,\"total\":1}";        JSONObject resultJson = JSONObject.fromObject(a);                System.out.println(resultJson.getString("retval"));//取JSON中跟数组同级值                JSONArray jsonArray = resultJson.getJSONArray("carlist");//取JSON数组中值        if(jsonArray != null && jsonArray.size() > 0){            for(int i = 0;i