Spring Boot

Spring Boot delivers production-ready, stand-alone Spring applications with minimal configuration, leveraging convention over configuration.

This technology is the fastest way to build robust Java-based microservices and web apps. Spring Boot eliminates boilerplate setup through its 'opinionated' approach and powerful auto-configuration feature, drastically accelerating development time. It provides essential 'starter' dependencies (like `spring-boot-starter-web`) to simplify your build, automatically configuring frameworks like Spring MVC and Hibernate. Furthermore, it embeds servers (Tomcat, Jetty, or Undertow) directly, allowing you to run a complete application using a simple `java -jar` command. For operations, the Actuator module provides production-grade monitoring endpoints (health checks, metrics) right out of the box.

https://spring.io/projects/spring-boot