Key Changes in Spring Boot 3.0.0 M1 Release

On January 20, 2022, the Spring team announced the first milestone (M1) of Spring Boot 3.0.0.

Java baseline upgraded to Java 17

The new baseline reflects the industry shift toward Java 17 as the mainstream version.

From Java EE APIs to Jakarta EE

Spring Boot 3 requires all Java EE APIs to be migrated to Jakarta EE. Import statements that previously used javax.servlet.Filter must now use jakarta.servlet.Filter . Some third‑party libraries that still depend on Java EE APIs (e.g., EhCache 3, Infinispan, Jolokia, Pooled JMS) are temporarily removed until Jakarta‑compatible versions are available.

Features removed

The following components are no longer supported in this milestone:

Apache ActiveMQ

Atomikos

EhCache 2

Hazelcast 3

Dependency upgrades

Spring projects now depend on newer versions:

Micrometer 2.0.0-M1

Spring AMQP 3.0.0-M1

Spring Batch 5.0.0-M1

Spring Data 2022.0.0-M1

Spring Framework 6.0.0-M2

Spring Integration 6.0.0-M1

Spring HATEOAS 2.0.0-M1

Spring Kafka 3.0.0-M1

Spring LDAP 3.0.0-M1

Spring REST Docs 3.0.0-M1

Spring Security 6.0.0-M1

Spring Session 2022.0.0-M1

Spring Web Services 4.0.0-M1

Third‑party libraries also receive updates, such as Artemis 2.20.0, Hazelcast 5.0, Hibernate Validator 7.0, various Jakarta components (Activation, Annotation, JMS, JSON, JSON‑Bind, Mail, Persistence, Servlet, Servlet JSP JSTL, Transaction, Validation, WebSocket, WS RS, XML Bind, XML Soap), Jetty 11, jOOQ 3.16, and Tomcat 10.

Future plans

The Spring Boot team will release a new milestone every two months; M2 is expected on March 24, and the GA version is slated for late November.

Reference

https://spring.io/blog/2022/01/20/spring-boot-3-0-0-m1-is-now-available