String json = "[{\"n\":\"北京\",\"i\":11,\"p\":0,\"y\":\"b\"},{\"n\":\"北京\",\"i\":1101,\"p\":11,\"y\":\"b\"}]";

        JSONArray jsonArray = JSONArray.parseArray(json);

        for (Object value : jsonArray) {

            JSONObject serverEntryObj = (JSONObject)  value;

            System.out.println(serverEntryObj.getString("n"));

        }