Spring Boot 4.0 Upgrade Preview

Spring Boot 4.0 lands next November on Java 17, and Stéphane Nicoll with Brian Clozel are here to guide you through upgrading an existing app. It’s the perfect excuse to tap into new language goodies and framework features.

Along the way you’ll zap future NPEs with Spring’s Nullness metadata plus JSpecify checks, swap in fine-grained dependencies for maximum flexibility, adopt Jackson 3.0’s slick new defaults, and even spin up async RestClient calls—no Reactive types required.

Watch on YouTube