public static void main(String[] arg0) { String reString = "{" + ""code": 100, "msg": "", "data": { "rows": [{ "item": "小型车辆", "value": "100" },{ "item": "大型车辆", "value": "200" }] }" + "}"; JSONObject obj = JSONObject.fromObject(reString); JSONArray jsonArray = obj.getJSONObject("data").getJSONArray("rows"); System.out.println(jsonArray.toString()); /** * 错误例子: * List<Map<String, String>> mapListJson = JSONArray.toList(jsonArray); * 会报标题上的错 */ List<Map<String, Object>> mapListJson = (List<Map<String, Object>>) JSONArray.toList(jsonArray, Map.class); Integer value = 0; for (Map<String, Object> m : mapListJson) { value += Integer.parseInt(m.get("value") == null ? "0" : m.get("value").toString()); } System.out.println(value); }