From Spring Boot 2 to Spring Boot 3 with Java 21 and Jakarta EE

Jakarta EE 9 changed its package namespace from `javax.*` to `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 raised their baseline to Jakarta EE 9 API level which is supported by Tomcat 10 and Jetty 11 for example. Attending this session will teach you how to make this migration as smooth as possible. A live coding demo will take you through the steps involved, and point out where to pay special attention.

We will also briefly examine some of the changes planned for **Jakarta EE 11** that will prepare you for what to expect in future versions of Spring.

Transcript

1. From Spring Boot 2 To Spring Boot 3 with Java 21 and Jakarta EE Ivar Grimstad
 Jakarta EE Developer Advocate Eclipse Foundation
2. https://github.com/ivargrimstad https://www.linkedin.com/in/ivargrimstad @ivar_grimstad@mastadon.social ivargrimstad_of fi cial @ivar_grimstad https://www.threads.net/@ivargrimstad_of fi cial
4. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Speci fi cation Document API TCK Final Speci fi cation Compatible Implementation(s) Speci fi
5. Jakarta EE 10 Web Pro fi Jakarta EE 10 Platform Updated Not Updated New Authorization 2.1 Activation 2.1 Batch 2.1 Connectors 2.1 Mail 2.1 Messaging 3.1 Enterprise Beans 4.0 RESTful Web Services 3.1 JSON Processing 2.1 JSON Binding 3.0 Annotations 2.1 CDI Lite 4.0 Interceptors 2.1 Dependency Injection 2.0 Servlet 6.0 Server Pages 3.1 Expression Language 5.0 Debugging Support 2.0 Standard Tag Libraries 3.0 Faces 4.0 WebSocket 2.1 Enterprise Beans Lite 4.0 Persistence 3.1 Transactions 2.0 Managed Beans 2.0 CDI 4.0 Authentication 3.0 Concurrency 3.0 Security 3.0 Bean Validation 3.0
6. Jakarta EE 10 Core Pro fi Jakarta EE 10 Web Pro fi le Updated Not Updated New RESTful Web Services 3.1 JSON Processing 2.1 JSON Binding 3.0 Annotations 2.1 CDI Lite 4.0 Interceptors 2.1 Dependency Injection 2.0 Servlet 6.0 Server Pages 3.1 Expression Language 5.0 Debugging Support 2.0 Standard Tag Libraries 3.0 Faces 4.0 WebSocket 2.1 Enterprise Beans Lite 4.0 Persistence 3.1 Transactions 2.0 Managed Beans 2.0 CDI 4.0 Authentication 3.0 Concurrency 3.0 Security 3.0 Bean Validation 3.0
7. Jakarta EE 10 Core Pro fi le Updated Not Updated New RESTful Web Services 3.1 JSON Processing 2.1 JSON Binding 3.0 Annotations 2.1 CDI Lite 4.0 Interceptors 2.1 Dependency Injection 2.0
8. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Jakarta EE 10 API source level: Java SE 11 API binary level: Java SE 11 TCK run with: Java SE 11+17 App Developers (YOU) can use Java SE 17 features if you like!!
9. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) How is this Relevant to ?
10. javax.* -> jakarta.*
11. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) builds on
12. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) javax.* -> jakarta.*
13. Authorization 2.1 Activation 2.1 Batch 2.1 Connectors 2.1 Mail 2.1 Messaging 3.1 Enterprise Beans 4.0 RESTful Web Services 3.1 JSON Processing 2.1 JSON Binding 3.0 Annotations 2.1 CDI Lite 4.0 Interceptors 2.1 Dependency Injection 2.0 Servlet 6.0 Server Pages 3.1 Expression Language 5.0 Debugging Support 2.0 Standard Tag Libraries 3.0 Faces 4.0 WebSocket 2.1 Enterprise Beans Lite 4.0 Persistence 3.1 Transactions 2.0 Managed Beans 2.0 CDI 4.0 Authentication 3.0 Concurrency 3.0 Security 3.0 Bean Validation 3.0 Jakarta EE 10 Web Pro fi le Updated Not Updated New
14. Hibernate ORM
15. UUID as Basic Java Type @Entity public class Item { @Id @GeneratedValue(strategy=GenerationType.UUID) private java.util.UUID id; private String description; … }
16. Authorization 2.1 Activation 2.1 Batch 2.1 Connectors 2.1 Mail 2.1 Messaging 3.1 Enterprise Beans 4.0 RESTful Web Services 3.1 JSON Processing 2.1 JSON Binding 3.0 Annotations 2.1 CDI Lite 4.0 Interceptors 2.1 Dependency Injection 2.0 Servlet 6.0 Server Pages 3.1 Expression Language 5.0 Debugging Support 2.0 Standard Tag Libraries 3.0 Faces 4.0 WebSocket 2.1 Enterprise Beans Lite 4.0 Persistence 3.1 Transactions 2.0 Managed Beans 2.0 CDI 4.0 Authentication 3.0 Concurrency 3.0 Security 3.0 Bean Validation 3.0 Jakarta EE 10 Platform Updated Not Updated New
17. Hibernate Validator
18. Authorization 2.1 Activation 2.1 Batch 2.1 Connectors 2.1 Mail 2.1 Messaging 3.1 Enterprise Beans 4.0 RESTful Web Services 3.1 JSON Processing 2.1 JSON Binding 3.0 Annotations 2.1 CDI Lite 4.0 Interceptors 2.1 Dependency Injection 2.0 Servlet 6.0 Server Pages 3.1 Expression Language 5.0 Debugging Support 2.0 Standard Tag Libraries 3.0 Faces 4.0 WebSocket 2.1 Enterprise Beans Lite 4.0 Persistence 3.1 Transactions 2.0 Managed Beans 2.0 CDI 4.0 Authentication 3.0 Concurrency 3.0 Security 3.0 Bean Validation 3.0 Jakarta EE 10 Platform Updated Not Updated New
20. Eclipse Jetty Apache Tomcat
21. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Demo
22. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) New Spring App Scenario 1
23. Spring Boot 3 + Tomcat 9 duke-spring Spring Boot 3 + Tomcat 10 duke-spring
24. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Upgrade Spring App Scenario 2
25. Spring Boot 2 Spring Boot 3 duke-boot duke-boot
26. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) javax.* -> jakarta.*
27. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) IDE
29. docs.openrewrite.org/recipes/java/migrate/jakarta
30. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) 1. Update Spring version in pom.xml 2. Update Jakarta EE version in pom.xml 3. Fix the imports https://github.com/ivargrimstad/jakartaee-spring
31. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Upgrade Spring App Scenario 3 with Dependencies
32. Spring Boot 2 duke-boot duke-dep Spring Boot 3 duke-boot duke-dep
33. duke-dep Source
34. Spring Boot 2 duke-boot duke-dep Spring Boot 3 duke-boot duke-dep 2.0 1.0
35. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) 1. Update Spring version in pom.xml 2. Update Jakarta EE version in pom.xml 3. Fix the imports 4. Repeat for Dependencies https://github.com/ivargrimstad/jakartaee-spring
36. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Upgrade Spring App Scenario 4 with Transitive Dependencies
37. Spring Boot 2 duke-boot duke-dep duke-lib Spring Boot 3 duke-boot duke-dep duke-lib
38. Source duke-dep Source duke-lib
39. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Transformation
40. Eclipse Transformer Apache Tomcat Migration Tool b.com/eclipse/transformerhttps://tomcat.apache.org/download-migration.cgi
41. Eclipse Transformer https://github.com/eclipse/transformer
42. Spring Boot 2 duke-boot duke-dep duke-lib Spring Boot 3 duke-boot duke-dep duke-lib 2.0 1.0 2.0 1.0
43. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) 1. Update Spring version in pom.xml 2. Update Jakarta EE version in pom.xml 3. Fix the imports 4. Repeat for Dependencies 5. Transform Libraries if necessary https://github.com/ivargrimstad/jakartaee-spring
44. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Additional Migration Steps
45. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) 1. Update Spring version in pom.xml 2. Update Jakarta EE version in pom.xml 3. Fix the imports 4. Repeat for Dependencies 5. Transform Libraries if necessary 6. Rename properties pre fi xed with javax 7. Verify data and dynamic content https://github.com/ivargrimstad/jakartaee-spring
46. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Java 21
47. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Beyond 10
48. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Jakarta EE 11 H1, 2024
49. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Release Cadence ~6-9 Months after the latest LTS of Java
50. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Jakarta Data Standardizes the repository pattern for data access https://jakarta.ee/speci fi cations/ NEW in Jakarta EE 11
51. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Jakarta NoSQL Standardizes integration with NoSQL databases https://jakarta.ee/speci fi cations/nosql/ Prospective
52. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Jakarta RPC Standardizes gRPC within Jakarta EE https://jakarta.ee/speci fi cations/rpc/ Standalone
53. Jakarta EE 11 API source level: Java SE 17 API binary level: Java SE 17 TCK run with: Java SE 17+21 App Developers (YOU) can use Java SE 21 features if you like !!
54. COPYRIGHT (C) 2022, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Summary
55. Jakarta EE 10 Platform Updated Not Updated New Authorization 2.1 Activation 2.1 Batch 2.1 Connectors 2.1 Mail 2.1 Messaging 3.1 Enterprise Beans 4.0 RESTful Web Services 3.1 JSON Processing 2.1 JSON Binding 3.0 Annotations 2.1 CDI Lite 4.0 Interceptors 2.1 Dependency Injection 2.0 Servlet 6.0 Server Pages 3.1 Expression Language 5.0 Debugging Support 2.0 Standard Tag Libraries 3.0 Faces 4.0 WebSocket 2.1 Enterprise Beans Lite 4.0 Persistence 3.1 Transactions 2.0 Managed Beans 2.0 CDI 4.0 Authentication 3.0 Concurrency 3.0 Security 3.0 Bean Validation 3.0
56. Authorization 3.0 Activation 2.1 Batch 2.1 Connectors 2.1 Mail 2.1 Messaging 3.1 Enterprise Beans 4.0 RESTful Web Services 3.2 JSON Processing 2.1 JSON Binding 3.0 Annotations 3.0 CDI Lite 4.1 Interceptors 2.2 Dependency Injection 2.0 Servlet 6.1 Pages 4.0 Expression Language 6.0 Debugging Support 2.0 Standard Tag Libraries 3.0 Faces 4.1 WebSocket 2.2 Enterprise Beans Lite 4.0 Persistence 3.2 Transactions 2.0 CDI 4.1 Authentication 3.1 Concurrency 3.1 Security 4.0 Validation 3.1 Jakarta EE 11 Platform Updated Not Updated New Data 1.0 Under Developm ent
57. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) How is Relevant to
58. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) builds on
59. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) javax.* -> jakarta.*
60. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) 1. Update Spring version in pom.xml 2. Update Jakarta EE version in pom.xml 3. Fix the imports 4. Repeat for Dependencies 5. Transform Libraries if necessary 6. Rename properties pre fi xed with javax 7. Verify data and dynamic content https://github.com/ivargrimstad/jakartaee-spring
61. Jakarta EE https://jakarta.ee Jakartablogs
 https://jakartablogs.ee/ Ivar’s Hashtag Jakarta EE https://www.agilejava.eu/category/jakarta-ee/ Demo Code https://github.com/ivargrimstad/jakartaee-spring
62. Jakarta EE Overview Course available on