I've never used Spring or Spring Boot, and I'm having trouble understanding their appeal for the kinds of applications I build. My server-side work is usually limited to uploading and downloading JSON files, working with MongoDB, uploading and downloading images, and interacting with MySQL. Those tasks are straightforward with tools such as Tomcat, Netty, or a lightweight HTTP client. What additional problems are Spring and Spring Boot intended to solve, and when would their built-in features justify the extra framework complexity?
5 Answers
Spring is less about making a basic HTTP endpoint possible and more about providing a consistent foundation around it. It gives you established approaches for configuration, logging, monitoring, tracing, security, database access, third-party integrations, and dependency injection. Spring Boot packages those pieces into opinionated starters, so adding something like OAuth, Redis, scheduled jobs, metrics, or health checks can be mostly a matter of adding a dependency and configuration.
Spring Boot’s main selling point is production readiness with relatively little setup. It can create a standalone application with an embedded Tomcat, Jetty, or Undertow server, automatically configure common libraries, provide externalized configuration, and expose features such as health checks and metrics. You don’t need those features for every small service, but they become useful when the application has to be operated reliably over time.
You may simply not be the target audience yet. If your service only moves files and performs a few database operations, a lightweight stack can be perfectly appropriate. Spring tends to pay off when the system grows, several developers need to work in a familiar structure, or the application requires security, transactions, integrations, testing conventions, observability, and long-term maintenance.
Technology choices are often influenced by team familiarity as much as technical superiority. Spring is widely used, so companies can hire developers who already know it and maintain systems using common conventions. That ecosystem and availability of experienced developers can be a practical advantage, even when a smaller framework would be sufficient for an individual project.
Think of Spring as a large set of tested tools rather than a requirement for every server. The framework can reduce repeated plumbing once you know how it works, but there’s a real learning curve and it can feel heavier than writing the same small service directly. If your current approach is clear, reliable, and easy to maintain, there’s no need to adopt Spring just for its own sake.
That makes sense for a larger application, but for the file and database operations I described, I can already do the same things with a small amount of code using Tomcat or Netty.