Why You Should Stop Learning JSP: Modern Java Web Development Insights

The author recounts a debate about whether to learn JSP, noting that many still ask about it, but asserts that unless a job explicitly requires it, learning JSP is unnecessary.

Personal Experience with JSP

Starting Java in 1998, the author’s first real project in 2001 required JSP for a Japanese outsourcing system, learning it from WebLogic documentation. Early exposure to MVC came via Sun’s WAF and Struts, followed by work on large enterprise portals using WebLogic, Struts, and later front‑end libraries such as YUI, ExtJS, GWT, Bootstrap, Angular, and React.

Why JSP Is Unsuitable for Modern Development

Three main reasons are presented:

Frontend frameworks are mature and eliminate the need for JSP. Front‑end and back‑end are separated; the back‑end provides APIs while the front‑end handles presentation.

Spring MVC/WebFlux and Spring Boot are moving away from JSP. Since Spring 5, WebFlux (a reactive, non‑blocking model) does not support the Servlet API, so JSP cannot be used. Spring Boot also imposes limitations on JSP, as documented in its reference guide.

Microservice architectures leave no room for JSP. Embedding

@Controller

and JSPs in each microservice leads to fragmented URLs and tight coupling, while placing all controllers in an API gateway creates a monolithic hotspot. Proper microservice design relies on RESTful APIs and independent front‑end applications.

Images illustrate the Spring 5 WebFlux vs. MVC split, the placement of controllers in microservices, and the overall Spring ecosystem.

In conclusion, JSP is being squeezed between modern front‑end frameworks and evolving back‑end technologies; abandoning JSP broadens career options, while clinging to it limits developers to outdated monolithic patterns.