src/main/java/org/example/serialization/Main.java - master - Zakonreal/practice05

src/main/java/org/example/serialization/Main.java
67 строк2 KB
RodinRoman
init
02 май 2025, 02:50
02 май 2025, 02:50243e955
package org.example.serialization;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.*;

public class Main {
    public Main() throws JsonProcessingException {
    }

    public static void main(String[] args) throws IOException {

        try (FileOutputStream outputStream = new FileOutputStream("intDigits.txt");
             ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream)
        ){
            objectOutputStream.write(212);
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
//-----------
        try (FileOutputStream outputStream = new FileOutputStream("str.txt");
             ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream)
        ){
            objectOutputStream.writeUTF("hello world");
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

//-----------
        try (FileOutputStream outputStream = new FileOutputStream("user.txt");
             ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream)
        ){
            objectOutputStream.writeObject(new User("Alex", "Petrov", "qwerty"));
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

//-----------
        try (FileInputStream inputStream = new FileInputStream("user.txt");
             ObjectInputStream objectInputStream = new ObjectInputStream(inputStream);
        ){
            User user = (User) objectInputStream.readObject();
            System.out.println("User: " + user);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

        User user = new User("Alex", "Petrov", "qwerty");
        ObjectMapper mapper = new ObjectMapper();
        String json = mapper.writeValueAsString(user);
        System.out.println(json);

        FileOutputStream outputStream = new FileOutputStream("user.json");
        outputStream.write(json.getBytes());
        outputStream.close();

        User user1 = mapper.readValue(new FileInputStream("user.json"), User.class);
        System.out.println("Deserialized: " + user1);
    }
}