android Json解析

￡神魔★判官ぃ 2022-07-18 04:05 272阅读 0赞

1.需解析的json文件（中括号\[\]括起来的是json数组）

{
        "HeWeather data service 3.0": [
            {
                "aqi": {
                    "city": {
                        "aqi": "28",
                        "co": "0",
                        "no2": "15",
                        "o3": "94",
                        "pm10": "25",
                        "pm25": "13",
                        "qlty": "优",
                        "so2": "2"
                    }
                },
                "basic": {
                    "city": "北京",
                    "cnty": "中国",
                    "id": "CN101010100",
                    "lat": "39.904000",
                    "lon": "116.391000",
                    "update": {
                        "loc": "2016-09-05 17:52",
                        "utc": "2016-09-05 09:52"
                    }
                },
                "daily_forecast": [
                    {
                        "astro": {
                            "sr": "05:46",
                            "ss": "18:39"
                        },
                        "cond": {
                            "code_d": "100",
                            "code_n": "101",
                            "txt_d": "晴",
                            "txt_n": "多云"
                        },
                        "date": "2016-09-05",
                        "hum": "26",
                        "pcpn": "0.7",
                        "pop": "93",
                        "pres": "1009",
                        "tmp": {
                            "max": "31",
                            "min": "20"
                        },
                        "vis": "10",
                        "wind": {
                            "deg": "294",
                            "dir": "无持续风向",
                            "sc": "微风",
                            "spd": "6"
                        }
                    },
                    ...

2.需获取的数据

"wind_sc":"微风","wind_dir":"无持续风向"
    "ss":"18:41","sr":"05:46"
    "tmp":{"min":"18","max":"30"},
    "txt_d":"雷阵雨""txt_n":"多云"

3.创建类Item

package app.coolwhether.com.weatherapp.entity;
    
    /**
     * Created by kirito on 2016/9/3.
     */
    public class Item {
        private String wind_sc;
        private String wind_dir;
        private String tmp_min;
        private String tmp_max;
        private String txt_d;
        private String txt_n;
        private String ss;
        private String sr;
        private String date;
    
        public String getWind_sc() {
            return wind_sc;
        }
    
        public void setWind_sc(String wind_sc) {
            this.wind_sc = wind_sc;
        }
    
        public String getWind_dir() {
            return wind_dir;
        }
    
        public void setWind_dir(String wind_dir) {
            this.wind_dir = wind_dir;
        }
    
        public String getTmp_min() {
            return tmp_min;
        }
    
        public void setTmp_min(String tmp_min) {
            this.tmp_min = tmp_min;
        }
    
        public String getTxt_d() {
            return txt_d;
        }
    
        public void setTxt_d(String txt_d) {
            this.txt_d = txt_d;
        }
    
        public String getTxt_n() {
            return txt_n;
        }
    
        public void setTxt_n(String txt_n) {
            this.txt_n = txt_n;
        }
    
        public String getTmp_max() {
            return tmp_max;
        }
    
        public void setTmp_max(String tmp_max) {
            this.tmp_max = tmp_max;
        }
    
        public String getSs() {
            return ss;
        }
    
        public void setSs(String ss) {
            this.ss = ss;
        }
    
        public String getSr() {
            return sr;
        }
    
        public void setSr(String sr) {
            this.sr = sr;
        }
    
        public String getDate() {
            return date;
        }
    
        public void setDate(String date) {
            this.date = date;
        }
    }

4.从URL获取数据（此处参照： [android从URL获取数据][android_URL]）

5.json解析类

package app.coolwhether.com.weatherapp.support;
    
    import android.util.Log;
    
    import com.google.gson.Gson;
    
    import org.json.JSONArray;
    import org.json.JSONException;
    import org.json.JSONObject;
    
    import java.util.ArrayList;
    import java.util.List;
    
    import app.coolwhether.com.weatherapp.entity.Item;
    
    /**
     * Created by kirito on 2016/9/3.
     */
    public class JsonHelper {
        private static final String TAG = "JsonHelper";
    
        public static Item parseJsonToItem(String json) throws JSONException{
            JSONObject jsonObject = new JSONObject(json);
            JSONArray heWeather = jsonObject.getJSONArray("HeWeather data service 3.0");
            //Log.e(TAG, "parseJsonToList: ---heWeather"+heWeather);
            Item item = new Item();
            JSONObject object = heWeather.getJSONObject(0);//0或是其它数字（数列heWeather的下标都可以）
            JSONArray daily_forecast = null;
            if (object.has("daily_forecast")){
                daily_forecast = object.getJSONArray("daily_forecast");
                //Log.e(TAG, "parseJsonToList: daily_forecast---"+daily_forecast );
                JSONObject obj = daily_forecast.getJSONObject(0);
                JSONObject wind = null;
                if (obj.has("wind")){
                    wind = obj.getJSONObject("wind");
                    //Log.e(TAG, "parseJsonToList: wind---"+wind );
                    item.setWind_dir(wind.optString("dir"));
                    item.setWind_sc(wind.optString("sc"));
                    //Log.e(TAG, "parseJsonToList: dir,sc"+ wind.optString("dir"));
                }
    
                JSONObject astro = null;
                if (obj.has("astro")){
                    astro = obj.getJSONObject("astro");
                    item.setSr(astro.optString("sr"));
                    item.setSs(astro.optString("ss"));
                    //Log.e(TAG, "parseJsonToItem: ss---"+ astro.optString("ss"));
                }
    
                JSONObject temp = null;
                if (obj.has("tmp")){
                    temp = obj.getJSONObject("tmp");
                    item.setTmp_max(temp.optString("max"));
                    item.setTmp_min(temp.optString("min"));
                    //Log.e(TAG, "parseJsonToItem: max---"+ temp.optString("max"));
                }
    
                if(obj.has("date")){
                    item.setDate(obj.optString("date"));
                    //Log.e(TAG, "parseJsonToItem: date---"+ obj.optString("date"));
                }
    
                if (obj.has("cond")){
                    JSONObject cond = obj.getJSONObject("cond");
                    item.setTxt_d(cond.optString("txt_d"));
                    item.setTxt_n(cond.optString("txt_n"));
                    //Log.e(TAG, "parseJsonToItem: txt_d---"+ cond.optString("txt_d"));
                }
            }
            return item;
        }
    
    }

6.调用的方法

item = JsonHelper.parseJsonToItem(s);
    //s为URL处获取的json数据

7.然后即可通过返回的item获取需要的数据.

[android_URL]: http://blog.csdn.net/zzldm/article/details/52432343