I've never used Spring or Spring Boot, and even after reading about them I'm not sure what problem they solve for me. My server-side work is usually limited to uploading and downloading JSON files and images, plus interacting with MongoDB and MySQL. For a backend this straightforward, what would Spring add beyond using something lightweight such as Tomcat, Netty, or a few focused libraries? What kinds of requirements make Spring or Spring Boot worthwhile?
5 Answers
A lot of Spring’s popularity is practical rather than purely technical. It has become a common enterprise standard, so companies can hire developers who already know it, reuse established project structures, and rely on a large ecosystem of integrations. That familiarity can reduce organizational risk, even if a smaller custom solution might be more elegant for one particular service.
You may simply not be the target audience yet. For a small service with a handful of endpoints, a lightweight stack can be perfectly reasonable and may even be easier to understand. Spring becomes more attractive when the system grows, several developers need to work in a familiar structure, or the organization values long-term support, reliability, and a large pool of developers already experienced with the ecosystem.
Think of Spring as a large, well-tested toolbox. You don’t need the advanced tools for every job, and adopting the framework can add complexity if your current solution already works. The tradeoff is that Spring has a learning curve, and it may not improve productivity immediately. If your service is simple and stable, there’s no requirement to switch; the benefits usually appear when requirements, integrations, security concerns, or team size expand.
Spring Boot’s main appeal is convenience and standardization. You can build a standalone application with an embedded Tomcat, Jetty, or Undertow server, use starter dependencies, externalize configuration, and get production features such as health checks and metrics with relatively little setup. It’s less about making a few endpoints possible and more about giving a growing service a consistent, production-ready foundation.
Spring is most valuable once an application needs more than basic request handling and database access. It gives you established patterns and integrations for configuration, logging, monitoring, tracing, security, third-party services, and dependency injection. Spring Boot packages those capabilities into opinionated starters and automatic configuration, so you can add something like OAuth, scheduled jobs, Redis, health checks, or metrics without wiring every library together yourself.
That makes sense for a larger or more complicated system, but for my current JSON, image, and database operations, I’m not convinced I’d gain much over a small Tomcat or Netty application.