Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang. The code is tested using the latest revision of the JDK for supported LTS releases: 8, 11, 17, 21 and 25 currently.

API for Apache Log4J, a highly configurable logging tool that focuses on performance and low garbage generation. It has a plugin architecture that makes it extensible and supports asynchronous logging based on LMAX Disruptor.

Generates a report on violations of code style and optionally fails the build if violations are detected.

The Maven Site Plugin is a plugin that generates a site for the current project.

The Apache Log4j SLF4J API binding to Log4j 2 Core

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

YAML 1.1 parser and emitter for Java

The Apache Commons Collections package contains types that extend and augment the Java Collections Framework.

Apache HttpComponents Core (blocking I/O)

Core classes of Apache Maven to manage the building process.

The Versions Maven Plugin is used when you want to manage the versions of artifacts in a project's POM.