How does JSON serialization work in Java?

How does JSON serialization work in Java?

JSON serialization in Java converts Java objects into JSON format, making it easy to transmit data.

What libraries can I use for JSON serialization in Java?

Popular libraries include Jackson, Gson, and org.json. Each has its own features and usage.

Can you show me a simple example using Gson?

Sure! Here's a basic example:

import com.google.gson.Gson;

class User {
    String name;
    int age;
}

public class Main {
    public static void main(String[] args) {
        User user = new User();
        user.name = "Alice";
        user.age = 30;
        Gson gson = new Gson();
        String json = gson.toJson(user);
        System.out.println(json);
    }
}

What about deserialization? How do I convert JSON back to a Java object?

You can use the same Gson library. Here's how:

User user = gson.fromJson(jsonString, User.class);