Stop Overcomplicating File Upload in Spring Boot

Building a file upload API in Spring Boot looks simple… until it isn’t. You start with one endpoint, and suddenly: file paths are scattered everywhere validation is inconsistent storage logic leaks into controllers I’ve seen this turn into a mess very quickly. In some cases, teams end up rewriting their entire file handling logic. Here’s how to build it clean from the start. Why file upload APIs get messy File upload starts simple, but complexity grows fast: handling diff