Spring Team
Juergen Hoeller

Juergen Hoeller

Spring Framework project lead

Linz, Austria

Juergen Hoeller is co-founder of the Spring Framework open source project and has been serving as the project lead and release manager for the core framework since 2003. Juergen is an experienced software architect and consultant with outstanding expertise in code organization, transaction management and enterprise messaging.
Blog Posts by Juergen Hoeller

Spring Framework 5.0 RC2 available now

Dear Spring community,

It is my pleasure to announce that our second Spring Framework 5.0 release candidate is available now. This is a major revision of RC1, with refactorings in our new reactive facilities and in our new path pattern parser, as well as code style refinements all over the framework.

This release introduces a formal non-null API declaration for all of our packages, with explicitly nullable arguments and return values annotated as such now (instead of just javadoc’ed). Our nullability annotations are compliant with JSR 305 and specifically supported by IntelliJ IDEA and upcoming versions of Kotlin, with the potential to deliver particularly strong benefits for Kotlin users (which is why we’ve rolled them into 5.0 still). Note that we apply stronger null enforcement in some Spring APIs now, superseding our previously lenient null handling.

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Spring Framework 5.0 goes RC1

Dear Spring community,

It is my pleasure to announce that a feature-complete Spring Framework 5.0 release candidate is available now! We are expecting a further release candidate at the end of May and a final release in late June at this point.

As a major revision of the core framework, 5.0 RC1 comes with a Java 8+ baseline and many infrastructure refinements: e.g. our own Commons Logging bridge autodetecting Log4j 2, SLF4J, JUL by default; streamlined use of Servlet 3.1+; and early support for JUnit 5.0 M4.

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Spring Framework 5.0 M5 released

Dear Spring community,

Leading into 2017, the fifth Spring Framework 5.0 milestone is available now. Once again, please check the project page for how to obtain it from our milestone repository.

This is the last milestone before we enter the release candidate phase. Our feature-complete RC1 is planned for early April, initiating a series of release candidates up until June. With this timeline, against near-final releases of OpenJDK 9 and several EE 8 specifications, our 5.0 generation covers early JDK 9 support as well as Servlet 4.0 and Bean Validation 2.0 already.

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Spring Framework 5.0 M4 released

Dear Spring community,

It is my pleasure to announce that the fourth Spring Framework 5.0 milestone is available now, right in time to wrap up 2016! Once again, please check the project page for how to obtain it from our milestone repository and the updated “Reactive Web Applications” documentation.

This milestone brings our reactive efforts close to completion and introduces a functional bean registration facility as well as comprehensive support for the Kotlin language. Stay tuned for a dedicated blog post on Kotlin…

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Spring Framework 5.0 M3 released

Dear Spring community,

It is my pleasure to announce that the third Spring Framework 5.0 milestone is available now: Once again, please check the project page for how to obtain it from our milestone repository.

This milestone introduces our redesigned reactive web client as well as redesigned RxJava adapters (including support for the recent RxJava 1.2 and 2.0) and model attribute support for our reactive web dispatcher.

Next up is 5.0 M4 in December, right ahead of Christmas, completing our core reactive stack and our functional design story… before we move towards a first Spring Framework 5.0 release candidate in February.

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Spring Framework 5.0 M2 released

Dear Spring community,

It is my pleasure to announce that the second Spring Framework 5.0 milestone is available now: Check http://projects.spring.io/spring-framework/ for how to obtain it from our milestone repository, and keep your feedback coming!

This release introduces a functional web endpoint variant, based on the same foundation as our reactive @Controller model (introduced in 5.0 M1). Stay tuned for Arjen’s dedicated blog post, coming up tomorrow! Here’s a teaser…

RouterFunction<String> route =
    route(GET("/hello-world"),
        request -> Response.ok().body(fromObject("Hello World")));
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Spring Framework 5.0 M1 released

Dear Spring community,

It is my pleasure to announce that the first Spring Framework 5.0 milestone is available now: Check http://projects.spring.io/spring-framework/ for how to obtain it from our milestone repository, and give it a spin while it’s hot!

Find out about the 5.0 M1 changes on our What’s New wiki page or in more detail on JIRA. Follow our master branch on GitHub for the latest updates.

Most importantly, our Spring Reactive initiative has been merged into Spring Framework proper, with core reactive functionality and reactive web endpoint support available out of the box now. Stay tuned for Rossen’s blog post on our reactive programming story in 5.0 M1!

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Spring Framework 4.3 goes GA

Dear Spring community,

I’m pleased to announce that Spring Framework 4.3 GA (a.k.a. 4.3.0.RELEASE) is now available from repo.spring.io as well as Maven Central!

In addition to the feature themes mentioned in my 4.3 RC1 announcement, the GA release covers compatibility with several recent third-party releases, in particular: Hibernate ORM 5.2, Jackson 2.8, Netty 4.1, Undertow 1.4, and Tomcat 8.5.2 / 9.0 M6. Also, please note that our Hibernate 3.x support is finally deprecated (even Hibernate 4.x is not actively supported by Red Hat anymore) and that Spring 4.3’s Jackson support requires Jackson 2.6+ now.

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Spring Framework 4.3 goes RC1

Dear Spring community,

It is my pleasure to announce that a feature-complete Spring Framework 4.3 release candidate is available now! This is a perfect opportunity for you to get involved: Please run your regression tests against it, and of course, feel free to try the new features…

Dependency injection refinements:

  • @Autowired injection of Map/Collection beans and self references
  • @Autowired on configuration class constructors (finally!)
  • No need for declaring @Autowired on a unique non-default constructor
  • ObjectProvider as a richer variant of an ObjectFactory handle
  • InjectionPoint/DependencyDescriptor as an injectable argument for @Bean methods
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