Java - Json Library

Java - Json Library

import org.json.JSONObject; import org.json.JSONArray; JSONObject obj = new JSONObject(); obj.put("name", "David"); obj.put("age", 40);

import com.fasterxml.jackson.databind.ObjectMapper; public class User private String name; private int age; // constructors, getters, setters...

@JsonIgnoreProperties(ignoreUnknown = true) public class User // ... json library java

JSONArray hobbies = new JSONArray(); hobbies.put("reading"); hobbies.put("swimming"); obj.put("hobbies", hobbies);

// Deserialize User result = jsonb.fromJson(json, User.class); | Library | Serialization Speed | Deserialization Speed | Memory Usage | |---------|--------------------|----------------------|---------------| | Jackson | Fastest | Fastest | Moderate | | Gson | Fast | Fast | Low | | JSON-java | Slow | Slow | High (creates many objects) | | JSON-B (Yasson) | Moderate | Moderate | Moderate | import org

Whichever library you choose, mastering JSON processing is essential for modern Java development. Now go convert those objects to JSON and back! Did I miss your favorite library? Let me know about JSON-smart, Moshi (from Square), or Boon in the comments below!

// Serialize User user = new User("Frank", 45); String json = jsonb.toJson(user); Now go convert those objects to JSON and back

JSON (JavaScript Object Notation) has become the lingua franca of data exchange in modern web services, configuration files, and NoSQL databases. If you're a Java developer, you've likely faced the question: Which JSON library should I use?