Spring Boot 3.x Features You Shouldn’t Miss in 2025
When Spring Boot 3.0 first landed, it brought more than just a version bump—it marked a major shift for the Java development landscape. Now, as we move deeper into 2025, the 3.x series continues to evolve, shaping how modern backend systems are built, scaled, and maintained. If you’re building production-grade applications with Java, it’s not just worth knowing what changed—it’s essential. In this blog, we’ll look beyond the changelog and explore the Spring Boot 3.x features you actually shouldn’t miss. The Shift to Java 17+ and Jakarta EE 10 Let’s start with what forced many developers to sit up straight. Spring Boot 3.x requires a minimum Java version of 17 and is fully aligned with Jakarta EE 10. That means a clean break from Java EE packages ( javax.* ) to the newer Jakarta namespace ( jakarta.* ). Why this matters: If you're still running legacy Spring Boot 2.x applications, this isn’t just a version upgrade—it’s a migration project. Your code, your dependencies, your interna...