005.JSONObject，JSONArray，GSON和FastJSON

 

 

 

 

package com.json.enity;

import java.util.ArrayList;
import java.util.HashMap;

public class Earthquake
{
    public ArrayList<String> addresses;
    public ArrayList<Point> points;
    public ArrayList<ArrayList<String>> places;

    public ArrayList<String> getAddress()
    {
        return addresses;
    }

    public void setAddress(ArrayList<String> address)
    {
        this.addresses = address;
    }

    public ArrayList<Point> getPoints()
    {
        return points;
    }

    public void setPoints(ArrayList<Point> points)
    {
        this.points = points;
    }

    public ArrayList<ArrayList<String>> getPlaces()
    {
        return places;
    }

    public void setPlaces(ArrayList<ArrayList<String>> places)
    {
        this.places = places;
    }

    @Override
    public String toString()
    {
        return "Earthquake{" + "addresses=" + addresses + ", points=" + points + ", places=" + places + '}';
    }
}

package com.json.enity;

import java.util.HashMap;

public class Point
{
      public double x;
      public double y;

      public double getX()
      {
            return x;
      }

      public void setX(double x)
      {
            this.x = x;
      }

      public double getY()
      {
            return y;
      }

      public void setY(double y)
      {
            this.y = y;
      }

      @Override
      public String toString()
      {
            return "Point{" + "x=" + x + ", y=" + y + '}';
      }
}

package com.json.code;

import com.json.enity.Earthquake;
import com.json.enity.Point;
import org.json.JSONArray;
import org.json.JSONObject;

import java.util.ArrayList;

public class Json_Jdk
{
    public static String jsonString = "{\n" + "    \"addresses\": [\n" + "        \"广东省中山市火炬开发区在伟盛路附近距离顷九327米\", \n" + "        \"广东省中山市火炬开发区在伟盛路附近距离顷九327米\"\n" + "    ], \n" + "    \"points\": [\n" + "        {\n" + "            \"x\": 113.456021761023, \n" + "            \"y\": 22.5737174302826\n" + "        }, \n" + "        {\n" + "            \"x\": 113.456021761023, \n" + "            \"y\": 22.5737174302826\n" + "        }\n" + "    ], \n" + "    \"places\": [\n" + "        [\n" + "            \"测试区域\", \n" + "            \"su\"\n" + "        ], \n" + "        [\n" + "            \"测试区域\", \n" + "            \"su\"\n" + "        ]\n" + "    ]\n" + "}";

    public static void main(String[] args)
    {

        /**
         * 1.导入包import org.json.JSONObject
         * 2.将Json转换为Java对象
         */

        Earthquake earthquake = new Earthquake();
        //解析address属性并赋值
        JSONObject jsonObject = new JSONObject(jsonString);//将Json转换为Java对象
        JSONArray addressJSONArray = jsonObject.getJSONArray("addresses");
        ArrayList<String> addressArrayList = new ArrayList<>();
        for (int i = 0; i < addressJSONArray.length(); i++)
        {
            addressArrayList.add(addressJSONArray.getString(i));
        }
        earthquake.setAddress(addressArrayList);

        //解析points属性并赋值
        JSONArray points = jsonObject.getJSONArray("points");
        ArrayList<Point> pointsArrayList = new ArrayList<>();
        for (int i = 0; i < points.length(); i++)
        {
            Point point = new Point();
            JSONObject jsonObject1 = points.getJSONObject(i);
            point.setX((Double) jsonObject1.get("x"));
            point.setX((Double) jsonObject1.get("y"));
            pointsArrayList.add(point);
        }
        earthquake.setPoints(pointsArrayList);

        //解析places属性并赋值
        JSONArray placesJSONArray = jsonObject.getJSONArray("places");
        ArrayList<ArrayList<String>> placesArrayListDouble = new ArrayList<>();
        for (int i = 0; i < placesJSONArray.length(); i++)
        {
            ArrayList<String> innerArrayList = new ArrayList<>();
            JSONArray jsonArray = placesJSONArray.getJSONArray(i);
            for (int j = 0; j < jsonArray.length(); j++)
            {
                String o = (String) jsonArray.get(j);
                innerArrayList.add(o);
            }
            placesArrayListDouble.add(innerArrayList);
        }
        earthquake.setPlaces(placesArrayListDouble);

        System.out.println(earthquake);

    }


}

package com.json.code;

import com.google.gson.Gson;
import com.json.enity.Earthquake;

public class Geson_Json
{
    public  static String  jsonString="{\n" +
            "    \"addresses\": [\n" +
            "        \"广东省中山市火炬开发区在伟盛路附近距离顷九327米\", \n" +
            "        \"广东省中山市火炬开发区在伟盛路附近距离顷九327米\"\n" +
            "    ], \n" +
            "    \"points\": [\n" +
            "        {\n" +
            "            \"x\": 113.456021761023, \n" +
            "            \"y\": 22.5737174302826\n" +
            "        }, \n" +
            "        {\n" +
            "            \"x\": 113.456021761023, \n" +
            "            \"y\": 22.5737174302826\n" +
            "        }\n" +
            "    ], \n" +
            "    \"places\": [\n" +
            "        [\n" +
            "            \"测试区域\", \n" +
            "            \"su\"\n" +
            "        ], \n" +
            "        [\n" +
            "            \"测试区域\", \n" +
            "            \"su\"\n" +
            "        ]\n" +
            "    ]\n" +
            "}";


    public static void main(String[] args)
    {
        Gson gson = new Gson();
        Earthquake earthquake=gson.fromJson(jsonString,Earthquake.class);
        System.out.println(earthquake);
    }
}

package com.json.code;

import com.alibaba.fastjson.JSON;
import com.json.enity.Earthquake;

public class Fastjson_Json
{
    public  static String  jsonString="{\n" +
            "    \"addresses\": [\n" +
            "        \"广东省中山市火炬开发区在伟盛路附近距离顷九327米\", \n" +
            "        \"广东省中山市火炬开发区在伟盛路附近距离顷九327米\"\n" +
            "    ], \n" +
            "    \"points\": [\n" +
            "        {\n" +
            "            \"x\": 113.456021761023, \n" +
            "            \"y\": 22.5737174302826\n" +
            "        }, \n" +
            "        {\n" +
            "            \"x\": 113.456021761023, \n" +
            "            \"y\": 22.5737174302826\n" +
            "        }\n" +
            "    ], \n" +
            "    \"places\": [\n" +
            "        [\n" +
            "            \"测试区域\", \n" +
            "            \"su\"\n" +
            "        ], \n" +
            "        [\n" +
            "            \"测试区域\", \n" +
            "            \"su\"\n" +
            "        ]\n" +
            "    ]\n" +
            "}";


    public static void main(String[] args)
    {
        //Json转换为java对象
        Earthquake earthquake = JSON.parseObject(jsonString, Earthquake.class);
        System.out.println(earthquake);

        /**
         * 1.java对象转换为Json
         * 2.fastjson要求JSON串中属性名一定要是小写
         */
        String stringJSON = JSON.toJSONString(earthquake);
        System.out.println(stringJSON);
    }
}