Fastjson is a JSON processor (JSON parser + JSON generator) written in Java

Apache Commons BeanUtils provides an easy-to-use but flexible wrapper around reflection and introspection.

The Apache Commons IO library contains utility classes, stream implementations, file filters,

API for Jakarta Servlet, enabling web applications to handle HTTP requests and responses through a standard interface ...

Apache POI - Java API To Access Microsoft Format Files

JUnit Jupiter is the API for writing tests using JUnit 5.