JSONwork - master - Letta21/HWAbstrInheritance

JSONwork
82 строки4 KB
Letta21
update JSONwork
15 янв 2026, 01:11
15 янв 2026, 01:110ee15a5
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

import java.awt.*;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class mainJson {
    public static void main(String[] args) {
        JSONParser parser = new JSONParser();
        JSONObject jsonObject = null;
        try {
            Object obj = parser.parse(new FileReader("data.json"));
            jsonObject = (JSONObject) obj;
            System.out.println(jsonObject);
        } catch (IOException | ParseException e) {
            e.printStackTrace();
        }
        String lastName = (String) jsonObject.get("lastName");
        System.out.println(lastName);
        JSONObject adress = (JSONObject) jsonObject.get("address");
        String city = (String) adress.get("streetAddress");
        System.out.println(city);
        JSONArray phoneNumbers = (JSONArray) jsonObject.get("phoneNumbers");
        for (Object number : phoneNumbers) {
            System.out.println(number);
        }

        JSONObject obj = new JSONObject();
        obj.put("name", "mkyong.com");
        obj.put("age", 100);
        JSONArray list = new JSONArray();
        list.add("msg 1");
        list.add("msg 2");
        list.add("msg 3");
        obj.put("messages", list);
        try (FileWriter file = new
                FileWriter("new_data.json")) {
            file.write(obj.toJSONString());
            file.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }

        Cat cat = new Cat();
        cat.name = "Матроскин";
        cat.age = 5;
        cat.color = Color.blue.getRGB();
//Конвертируем объект созданного класса в JSON при помощи метода toJson():
        GsonBuilder builder = new GsonBuilder();
        Gson gson = builder.create();
        System.out.println(gson.toJson(cat));
        //Конвертируем JSON в объект
        String jsonText = "{\"name\":\"Мурзик\",\"color\":-16777216,\"age\":9}";
         builder = new GsonBuilder();
         gson = builder.create();
        cat = gson.fromJson(jsonText, Cat.class);
        System.out.println("Имя: " + cat.name + "\nВозраст: " + cat.age + "\nЦвет: " +
                cat.color);



    }
}
C:\Users\Letta\.jdks\openjdk-24.0.2+12-54\bin\java.exe "-javaagent:C:\Users\Letta\AppData\Local\Programs\IntelliJ IDEA Community Edition\lib\idea_rt.jar=61230" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\Users\Letta\IdeaProjects\json\target\classes;C:\Users\Letta\.m2\repository\com\googlecode\json-simple\json-simple\1.1.1\json-simple-1.1.1.jar;C:\Users\Letta\.m2\repository\junit\junit\4.10\junit-4.10.jar;C:\Users\Letta\.m2\repository\org\hamcrest\hamcrest-core\1.1\hamcrest-core-1.1.jar;C:\Users\Letta\.m2\repository\com\google\code\gson\gson\2.8.5\gson-2.8.5.jar mainJson
{"firstName":"Иван","lastName":"Иванов","address":{"streetAddress":"Московское \r\nш., 101, кв.101","city":"Ленинград","postalCode":101101},"phoneNumbers":["812 123-1234","916 123-4567"]}
Иванов
Московское 
ш., 101, кв.101
812 123-1234
916 123-4567
{"name":"Матроскин","age":5,"color":-16776961}
Имя: Мурзик
Возраст: 9
Цвет: -16777216

Process finished with exit code 0