Yes, dynamically generated code will be JIT-compiled by Excelsior JET runtime.
You can try it out using our Evaluation edition: https://www.excelsiorjet.com/evaluate
Also, there is an article in our Knowledge Base about compilation of Spring Boot application to which you may refer while evaluating: https://www.excelsiorjet.com/kb/38/howto-natively-compile-a-spring-boot-application
If you have more question, please don't hesitate to ask them in our support: email@example.com
Igor Jorch, Excelsior Suppor