Java Gson

Gson is a Java library provided by Google that is used for serializing and deserializing Java objects to and from JSON (JavaScript Object Notation) format. Gson stands for “Google’s JSON.” It’s a popular choice for working with JSON data in Java applications because of its simplicity and flexibility.

Key features and usage of Gson include:

Serialization: Gson can convert Java objects into JSON format. This is useful when you want to send data from a Java application to a web service or store it in a JSON-based data store.
Deserialization: Gson can parse JSON data and create Java objects from it. This is valuable when you receive JSON data from an external source, such as a web API, and want to work with it as Java objects.
Simple API: Gson provides a straightforward and easy-to-use API for serialization and deserialization. You can typically achieve JSON conversion with just a few lines of code.
Custom Serialization and Deserialization: Gson allows you to customize the serialization and deserialization process by providing custom serializers and deserializers for specific Java classes or fields.
Support for Complex Objects: Gson can handle complex objects, including nested objects, lists, and maps, making it suitable for a wide range of data structures.
Null Handling: Gson provides options for handling null values in JSON data, allowing you to configure how nulls are treated during serialization and deserialization.
Date and Time Handling: Gson includes support for serializing and deserializing Java Date and Calendar objects to and from JSON in a customizable way.
Pretty Printing: Gson allows you to generate JSON output in a human-readable, “pretty printed” format, which is easier to read and debug.

Here’s a simple example of using Gson for serialization and deserialization:

java

import com.google.gson.Gson;

public class GsonExample {
    public static void main(String[] args) {
        // Create a Gson instance
        Gson gson = new Gson();

        // Serialize a Java object to JSON
        Person person = new Person("John Doe", 30);
        String json = gson.toJson(person);
        System.out.println("Serialized JSON: " + json);

        // Deserialize JSON to a Java object
        String jsonInput = "{\"name\":\"Alice\",\"age\":25}";
        Person alice = gson.fromJson(jsonInput, Person.class);
        System.out.println("Deserialized Person: " + alice.getName() + ", " + alice.getAge());
    }
}

class Person {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}

In this example, Gson is used to serialize a Person object to JSON and then deserialize JSON data back into a Person object.

Demo Day 1 Video:

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Java Gson

Demo Day 1 Video:

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