As outlined in this article any Jakarta EE 9 compliant application that embeds Spring Framework or Spring Boot components must use Spring Framework 6 and Spring Boot 3 respectively.

Furthermore Java EE 17+ is required.

Create a new ruleset under a new target/source path
Jakarta-ee9/java-ee

spring-components.windup.xml

The rules need to have a target of jakarta-ee [9,) and jws [6,)

Rule 1
Look for group org.springframework artifacts in pom.xml files <project>
or embedded <dependency> with a version range < 6.0.0

Category mandatory, SP 3
Version 6.0.0 is the minimum version of Spring Framework that is Jakarta EE 9+ compatible
Link: A Java 17 and Jakarta EE 9 baseline for Spring Framework 6

Rule 2
Look for group org.springframework.boot artifacts in pom.xml files <project>
or embedded <dependency> with a version range < 3.0.0

Category mandatory, SP 3
Version 3.0.0 is the minimum version of Spring Boot that is Jakarta EE 9+ compatible
Link: A Java 17 and Jakarta EE 9 baseline for Spring Framework 6