A Bootiful Podcast Spring cofounder Juergen Hoeller on the amazing Spring Framework 7 release
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Dec 18, 2025 
Juergen Hoeller, co-founder of the Spring Framework, shares insights on the groundbreaking Spring Framework 7. He discusses the importance of maintaining Java 17 as a baseline for compatibility and encourages adoption of the latest JDK for performance gains. Juergen introduces new features like JMS clients and the integration of JSpecify for enhanced null-safety. He also highlights runtime optimizations, resilience features, and improvements to the declarative HTTP client, all of which aim to empower developers and enhance user experience.
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Pragmatic Java Baseline
- Spring Framework 7 starts a new generation without raising the Java baseline beyond 17 to maximize compatibility.
- Juergen says Java 17 is a pragmatic, stable foundation while recommending users upgrade to newer JDKs like 25 when possible.
Upgrade To Later JDKs
- Upgrade your runtime when possible: Juergen recommends moving to the latest Java LTS and even JDK 25 for its virtual threads and Project Leiden features.
- He advises exploring and using JDK25 features rather than stopping at intermediate releases like 21.
Higher Third-Party Baseline
- Spring 7 requires Jakarta EE 11 APIs and targets modern providers like Tomcat 11 and Hibernate 7.
- Juergen frames this as a higher third-party library baseline while keeping Java baseline lower for compatibility.