Gson is an open source Java library to serialize and de-serialize Java objects to/from JSON. Gson can work with arbitrary Java objects including pre-existing objects that you do not have source code.

Initial Release : May 22,2008
Written in: Java
Developed By: Google
Stable Release : 2.8.2 in 19 Sep, 2017
License: Apache License 2.0

Why GSON is Popular?

• provide simple methods toJson() and fromJson() to convert Java objects to JSON and vice-versa.
• Extensive support of Java Generics.
• allow custom representaion of objects.
• allow pre-existing unmodifiable objects to be converted to and from JSON.
• support for complex objects with generic types and having deep inheritance.

Configuration/Dependency

Below dependency required to configure GSON in your application

<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.2</version>
</dependency>