spring-boot4-guide

Spring Boot 4 migration requires auditing your Spring Boot 3 project against Boot 4 prerequisites, reviewing breaking changes and baseline requirements, then applying structured upgrade patterns for services, libraries, and test suites to achieve a smooth transition.

Spring Boot 4 and Spring Framework 7 introduce specific baseline requirements and breaking changes involving Jakarta EE and modularization. You must verify compatibility prerequisites and understand new features before upgrading your existing services and test suites.

Yes, Spring Boot 4 supports Jakarta EE and modularization through Spring Framework 7. The guide provides references to modularization guides and specifies compatibility prerequisites to ensure your project structure aligns with the new baseline requirements.

The best way to plan a Spring Framework 7 upgrade is to follow practical migration patterns tailored to your real-world scenarios. Audit typical services, libraries, and test suites against Boot 4 prerequisites to ensure clear upgrade outcomes and minimal downtime.

You should delay upgrading to Spring Boot 4 if your current project fails to meet the baseline compatibility prerequisites, or if your services, libraries, and test suites cannot absorb the breaking changes introduced by Spring Framework 7 and Jakarta EE.