Is spring a backend in Java?

Spring Boot is a backend framework that has become a major player in the enterprise Java ecosystem. It lets Java developers start building web applications quickly, without fuss.

A backend service can be of any type. It can be a data service, web service, java service, security service, or using a third party API . Or, even extending a feature with your own code. Thus, you can consider external data as a service.

First Web Application Using Java Servlet