JavaBeans Validation (Bean Validation) is a validation model that can add constraints to the beans with annotations placed on fields, methods, or classes.

Starter for building web, including RESTful, applications using Spring MVC. Uses Tomcat as the default embedded container (deprecated in favor of spring-boot-starter-webmvc)

Spring Boot auto-configuration attempts to automatically configure your Spring application based on the jar dependencies that you have added.

Spring Boot makes it easy to create stand-alone, production-grade Spring based Applications that you can 'just run'. It takes an opinionated view of the Spring platform and third-party libraries so you can get started with minimum configuration.

Starter for using Java Bean Validation with Hibernate Validator

Hibernate's Jakarta Validation reference implementation.

Spark SQL is Apache Spark's module for working with structured data based on DataFrames.

Starter for using WebFlux and Reactor Netty

Jersey core server implementation

Implementation of the JAX-RS specification by JBoss for building RESTful web services in Java.

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