servlet接收request请求的json数据

此次使用的是alibaba的fastjson：jar包为fastjson-1.2.7.jar

参考：https://www.qingtingip.com/h_229797.html

思路：由于此次接收到的json数据格式为：{"list":[{"tHumidity":0,"tLightIntensity":0,"tTemperature":0,"tSerialNumber":"02001"},{"..........]}

　　　即{key: value(value为数组)}，需要先提取出value，value为JSONArray类型，再对value数组进行遍历，再通过强转为JSONObject

　　　从而对数组元素中的json的键值进行读取。

alibaba的json的pom依赖

<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->

<dependency>

    <groupId>com.alibaba</groupId>

    <artifactId>fastjson</artifactId>

    <version>1.2.60</version>

</dependency>

　　　　 JSONObject json= new JSONObject();

        JSONArray list = new JSONArray();

        BufferedReader br;

        String jsonStr = null;

        String jsonStr2 = null;

        try {

            br = new BufferedReader(new InputStreamReader((ServletInputStream) request.getInputStream()));

            String line = null;

            StringBuilder sb = new StringBuilder();

            while ((line = br.readLine()) != null) {

                sb.append(line);

            }

            json= JSONObject.parseObject(sb.toString());

            jsonStr = JSONObject.toJSONString(json);

            list = json.getJSONArray("list");

            jsonStr2 = JSONArray.toJSONString(list);

        } catch (IOException e) {

            e.printStackTrace();

        }

        System.out.println(json);

        System.out.println(list);

        //System.out.println(jsonStr.substring(0,jsonStr.length()-1));

        // System.out.println(jsonStr);

        System.out.println("======================");

//            List<MyClass> list = JSONObject.parseArray(jsonStr,  MyClass.class);

        for (int i = 0; i < list.size();i++){

            JSONObject object = (JSONObject)list.get(i);

//            System.out.println(object);

            Zhongyao zhongyao = new Zhongyao();

            zhongyao.setId(UUIDUtil.uuid());

            zhongyao.settSerialNumber(object.getString("tSerialNumber"));

            zhongyao.settTemperature((object.getDouble("tTemperature") == null) ? 0 :object.getDouble("tTemperature"));

            zhongyao.settHumidity((object.getDouble("tHumidity") == null) ? 0 : object.getDouble("tHumidity"));

            zhongyao.settLightIntensity((object.getDouble("tLightIntensity") == null) ? 0 : object.getDouble("tLightIntensity"));

            zhongyao.settSoilTemperature((object.getDouble("tSoilTemperature") == null) ? 0 :object.getDouble("tSoilTemperature"));

            zhongyao.settSoilHumidity((object.getDouble("tSoilHumidity") == null) ? 0 : object.getDouble("tSoilHumidity"));

            zhongyao.settSoilPh((object.getDouble("tSoilPh") == null) ? 0 : object.getDouble("tSoilPh"));

            //(json.getDouble("tSoilPh") == null)

            System.out.println("+++++++++++++id:"+zhongyao.getId()+"tSerialNumber:"+zhongyao.gettSerialNumber()+

                    "tTemperature:"+zhongyao.gettTemperature()+"tHumidity:"+zhongyao.gettHumidity()+"tLightIntensity:"+zhongyao.gettLightIntensity()

                    +"tSoilTemperature:"+zhongyao.gettTemperature()+"tSoilHumidity:"+zhongyao.gettHumidity()+"tSoilPh:"+zhongyao.gettSoilPh());

            // }

            //4. 调用Service保存

            DataService service = new DataServiceImpl();

            service.addData(zhongyao);

        }