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

ivargrimstad
December 07, 2023

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

December 07, 2023
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  1. Ivar Grimstad

    Jakarta EE Developer Advocate
    Eclipse Foundation
    From Spring Boot 2 To Spring Boot 3
    with Java 21 and Jakarta EE
    Toronto Java Users Group

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  2. @ivar_grimstad
    https://github.com/ivargrimstad
    https://www.linkedin.com/in/ivargrimstad
    @[email protected]
    ivargrimstad_of
    fi
    cial

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  3. COPYRIGHT (C) 2023, 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

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  4. 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

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  5. 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

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  6. 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

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  7. COPYRIGHT (C) 2023, 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!!

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  8. COPYRIGHT (C) 2023, 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
    ?

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  9. javax.* -> jakarta.*

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  10. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    builds on

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  11. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    javax.* -> jakarta.*

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  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 Web Pro
    fi
    le
    Updated
    Not Updated
    New

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  13. Hibernate ORM

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  14. UUID as Basic Java Type
    @Entity
    public class Item {
    @Id
    @GeneratedValue(strategy=GenerationType.UUID)
    private java.util.UUID id;
    private String description;

    }

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  15. 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

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  16. Hibernate Validator

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  17. 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

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  18. Eclipse Jetty Apache Tomcat

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  19. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    Demo

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  20. COPYRIGHT (C) 2023, 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

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  21. Spring Boot 3
    +
    Tomcat 9
    duke-spring
    Spring Boot 3
    +
    Tomcat 10
    duke-spring

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  22. COPYRIGHT (C) 2023, 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

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  23. Spring Boot 2 Spring Boot 3
    duke-boot
    duke-boot

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  24. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    javax.* -> jakarta.*

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  25. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    IDE

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  26. docs.openrewrite.org/recipes/java/migrate/jakarta

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  27. COPYRIGHT (C) 2023, 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

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  28. COPYRIGHT (C) 2023, 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

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  29. Spring Boot 2
    duke-boot
    duke-dep
    Spring Boot 3
    duke-boot
    duke-dep

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  30. duke-dep
    Source

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  31. Spring Boot 2
    duke-boot
    duke-dep
    Spring Boot 3
    duke-boot
    duke-dep
    2.0
    1.0

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  32. COPYRIGHT (C) 2023, 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

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  33. COPYRIGHT (C) 2023, 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

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  34. Spring Boot 2
    duke-boot
    duke-dep duke-lib
    Spring Boot 3
    duke-boot
    duke-dep duke-lib

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  35. Source
    duke-dep
    Source
    duke-lib

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  36. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    Transformation

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  37. Eclipse Transformer Apache Tomcat Migration Tool
    b.com/eclipse/transformerhttps://tomcat.apache.org/download-migration.cgi

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  38. Eclipse Transformer
    https://github.com/eclipse/transformer

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  39. 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

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  40. COPYRIGHT (C) 2023, 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

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  41. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    Additional Migration
    Steps

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  42. COPYRIGHT (C) 2023, 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

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  43. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    Java 21

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  44. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    Beyond 10

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  45. COPYRIGHT (C) 2023, 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

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  46. COPYRIGHT (C) 2023, 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

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  47. COPYRIGHT (C) 2022, 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

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  48. COPYRIGHT (C) 2022, 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

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  49. COPYRIGHT (C) 2022, 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

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  50. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    Jakarta EE 11
    API source level: Java SE 21
    API binary level: Java SE 21
    TCK run with: Java SE 21

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  51. 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) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    Summary

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  52. 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

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  53. 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 4.0
    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 5.0
    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

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  54. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    How is Relevant
    to

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  55. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    builds on

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  56. COPYRIGHT (C) 2023, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
    javax.* -> jakarta.*

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  57. COPYRIGHT (C) 2023, 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

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  58. 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

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  59. Jakarta EE Overview
    Course available on

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