fastjson

fastjson is a Java library designed for high-performance conversion between Java objects and JSON strings. It supports arbitrary Java objects, including those without available source code, and handles complex scenarios such as deep inheritance hierarchies and extensive use of Java Generics.

Key Features:

• High performance on server-side and Android clients.
• Simple API via toJSONString() and parseObject().
• Support for pre-existing unmodifiable objects.
• Support for custom object representations.

Note on Versioning: Fastjson 2.0.x is available and is recommended for better performance and security. If you are using 1.x, consider upgrading.

To add fastjson to your Java project using Maven, include the following dependency in your pom.xml.

Note: The version in the example below is 2.0.31. Always check Maven Central for the most recent version.

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>2.0.31</version>
</dependency>

To add fastjson to your Java project using Gradle (via JCenter), add the following line to your dependencies block.

compile 'com.alibaba:fastjson:2.0.28'