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From Spring Boot 2 to Spring Boot 3 with Java 2...

ivargrimstad
January 31, 2024

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.

ivargrimstad

January 31, 2024
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  1. From Spring Boot 2 To Spring Boot 3 with Java

    21 and Jakarta EE Ivar Grimstad
 Jakarta EE Developer Advocate Eclipse Foundation
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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!!
  7. 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 ?
  8. 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
  9. 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.*
  10. 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
  11. UUID as Basic Java Type @Entity public class Item {

    @Id @GeneratedValue(strategy=GenerationType.UUID) private java.util.UUID id; private String description; … }
  12. 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
  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 Platform Updated Not Updated New
  14. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS

    LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Demo
  15. 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
  16. 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
  17. 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.*
  18. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS

    LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) IDE
  19. 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
  20. 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
  21. 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
  22. 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
  23. COPYRIGHT (C) 2024, ECLIPSE FOUNDATION, INC. | THIS WORK IS

    LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0) Transformation
  24. 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
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. 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
  31. 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
  32. 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
  33. 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
  34. 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 !!
  35. 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
  36. 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
  37. 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
  38. 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
  39. 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
  40. 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.*
  41. 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