Jakarta EE 9 changed its package namespace from
jakarta.*. This may sound like a trivial change that mostly affects Jakarta EE. So, why should Spring developers care?
As it turns out, the namespace changes ripple throughout the entire Java ecosystem. And Spring is no exception. Spring Framework 6 and Spring Boot 3 raise their baseline to Jakarta EE 9 API level which is supported by Tomcat 10 and Jetty 11 for example.
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