/*** 发送post请求传递Json*/public void jieXi() {new Thread(new Runnable() {public void run() {// Json中的引号必须加 \ 转义String getLightJson = "{\"object\":\"light\",\"action\":\"get\"}";String jsonParent = getJsonParent(getLightJson);if (ifJsonParentOk(jsonParent)) {ArrayList<light> query = getQuery(jsonParent);for (light l : query) {System.out.println("----------");System.out.println("co2-->" + l.getCo2());System.out.println("pm2.5-->" + l.getPm2_5());System.out.println("----------");}}}}).start();}/*** 返回Json* * @param json* @return*/public String getJsonParent(String json) {try {URI uri = new URI(urlString);HttpPost mhttpPost = new HttpPost(uri);// 设置请求头mhttpPost.setHeader("Accept", "application/json");mhttpPost.setHeader("Content-Type", "application/json");// Json数据在这里HttpEntity mEntity = new StringEntity(json, HTTP.UTF_8);mhttpPost.setEntity(mEntity);// 发送请求HttpResponse response = new DefaultHttpClient().execute(mhttpPost);String str = EntityUtils.toString(response.getEntity());System.out.println("--->" + str);return str;} catch (Exception e) {}return "";}/*** 返回码是不是ok* * @param str* @return*/public boolean ifJsonParentOk(String str) {try {jsonObject = new JSONObject(str);String result = jsonObject.getString("result");if (result.equals("ok")) {return true;}} catch (JSONException e) {// TODO Auto-generated catch block
            e.printStackTrace();}return false;}/*** 解析返回的json* * @param str* @return*/public ArrayList<light> getQuery(String str) {ArrayList<light> arrayList = new ArrayList<light>();try {light _light = new light();jsonObject = new JSONObject(str);_light.setPm2_5(jsonObject.getString("pm2.5"));_light.setCo2(jsonObject.getString("co2"));arrayList.add(_light);return arrayList;} catch (JSONException e) {e.printStackTrace();}return null;}