Spring Boot 4: What’s New & Why It Matters
🚀 Introduction Spring Boot has been the go-to framework for building Java backend applications for nearly a decade. With its 4.0 release in late 2025 , Spring Boot advances into a new generation — modernizing how Java applications are built, deployed, and scaled for cloud-native systems . In this blog, we will explore: The key new features in Spring Boot 4 Why these changes matter Real-world impact for developers and teams Tips for upgrading existing projects đź“Ś What Is Spring Boot 4? Spring Boot 4 marks a major milestone in the framework’s evolution — rebuilding its foundation around modern standards and developer expectations. It is based on Spring Framework 7 and aligns with modern Java and Jakarta EE versions. 🆕 Top New Features in Spring Boot 4 1. Modular Architecture for Leaner Apps One of the biggest internal changes in Spring Boot 4 is modular auto-configuration . Instead of a single large auto-configure JAR, Spring Boot now splits functionality ...