27 posts tagged with "spring-boot"

How do you prevent typos like "admin", "Admin", "ADMIM" when storing user roles? Use Java enums! Here's how to add type-safe roles to your JPA entities.

Can you compile Java code without a package declaration? Yes. Should you? Absolutely not. Here's why the package statement is essential, not optional.

Want to implement JWT authentication in Spring Boot? You need three dependencies, not one. Here's why and what each one does.

Have you ever added a single dependency to your pom.xml and wondered why Maven seems to download dozens of other libraries? Or why sometimes Maven doesn't download anything at all? This article demystifies Maven's dependency management, transitive dependencies, and the local cache system.

Your Spring Boot app won't start and you see a "database is locked" error. The culprit? Multiple instances of your application running simultaneously, all trying to access the same database file. Here's how to identify and fix this common problem.

Ever wondered what those spring.datasource.* and spring.jpa.* properties actually do when your Spring Boot app starts? Let's trace the complete journey from configuration file to running database, step by step.

Have you ever moved a Spring Boot project to a new location and suddenly faced mysterious dependency resolution errors, even though all your project files came with you? This article explains why IDE-specific caches and build artifacts cause these issues and how to properly fix them.