Hi, Spring fans! Welcome to another installment of This Week in Spring! I'm preparing my talks for several amazing shows including: Commit Your Code conference in Plano, Texas (starting tomorrow); Dev2Next in Colorado; Devoxx Belgium in Antwerp, Belgium; and CloudFoundry Days in Germany. So much good stuff comin' up! And so much good stuff in the community this week, as well, so let's dive right into it!

• I love this! One of my favorite new features in Spring Framework 7 is the new HTTP Service Clients
• there's so much good stuff coming in Spring AI 1.0.2 and improved MCP support
• Spring Modulith 2.0 M3 released. This new release includes updated event publication repository implementations for JPA, Jackson 3 support, and so much more.
• in last week's installment of A Bootiful Podcast, I talked to the amazing Spring Cloud lead Spencer Gibb
• Spring Boot 3.4.10 is available now
• Spring Boot 3.5.6 available now
• Spring Boot 4.0.0 M3 available now
• Spring AI 1.0.2 is available now
• …

In this 3rd blog post of the Road to GA series that’s highlighting major features within the Spring portfolio for the next major versions to be released in November we’ll have a look at new features for HTTP service clients, which are a collaborative effort across several Spring projects.

Introduction

Spring Framework 6 introduced the ability to define an HTTP service through a Java interface with @HttpExchange-annotated methods. For example:

public interface MilestoneService {

    @GetExchange("/repos/{org}/{repo}/milestones")
    List<Milestone> getMilestones(@PathVariable String org…

On behalf of the Spring AI engineering team and everyone who has contributed, I'm happy to announce that Spring AI 1.1.0-M2 has been released and is now available from Maven Central.

This milestone release focuses primarily on enhanced Model Context Protocol (MCP) support, incorporating critical fixes and improvements from the MCP Java SDK v0.13.0 release, along with significant updates across many areas of Spring AI.

Release Summary

This release includes 56 improvements, bug fixes, and documentation updates. The primary focus areas include:

• Model Context Protocol Enhancements: Updated to MCP Java SDK v0.13.1 with mcp-annotations v0.4.1 and protocol version 2025-06-18 support
• MCP Integration Fixes: Resolved critical stateless server registration issues with AOT compilation support
• New Features: 16 new capabilities and functionality additions
• Stability: 12 bug fixes addressing community-reported issues
• Documentation: 6 improvements including comprehensive MCP getting started guide
• Other Improvements: 22 enhancements including performance optimizations and dependency upgrades
…

I am pleased to announce the availability of Spring Modulith 2.0 M3. It release ships the following new features:

• Updated event publication repository implementation for JPA #1375
• Support for serialized event publication externalization #1370
• Jackson 3 support for event publication serialization and externalization #1369, #1364
• More lenient out-of-the-box verification for Hexagonal Architecture #1366
• Upgrade to Spring Boot 4.0 M3 #1376
• Upgrade to jMolecules 2025 RC5 #1377

Find more details about the releases in the full changelog.

Hi, Spring fans! In this installment, we talk to the legendary lead of Spring Cloud and friend to the community, Spencer Gibb! This was recorded live from Las Vegas, NV, at the fantastic SpringOne 2025 event!

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 3.4.10 has been released and is now available from Maven Central.

This release includes 36 bug fixes, documentation improvements, and dependency upgrades. Thanks to all those who have contributed with issue reports and pull requests.

How can you help?

If you're interested in helping out, check out the "ideal for contribution" tag in the issue repository. If you have general questions, please ask on stackoverflow.com using the spring-boot tag.

Project Page | GitHub | Issues | Documentation | Stack…

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 3.5.6 has been released and is now available from Maven Central.

This release includes 43 bug fixes, documentation improvements, and dependency upgrades. Thanks to all those who have contributed with issue reports and pull requests.

How can you help?

If you're interested in helping out, check out the "ideal for contribution" tag in the issue repository. If you have general questions, please ask on stackoverflow.com using the spring-boot tag.

Project Page | GitHub | Issues | Documentation | Stack…

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 4.0.0-M3 has been released and is now available from Maven Central.

This release includes 98 enhancements, documentation improvements, dependency upgrades, and bug fixes. Notable new features include:

• Jackson auto-configuration now requires Jackson 3
• Support for Kotlin Serialization
• Liveness and readiness probe endpoints are now enabled by default
• Improvements to MongoDB health indicators and configuration properties

Please see the release notes for more details and upgrade instructions.

Thanks to…

On behalf of the Spring AI engineering team and everyone who has contributed, I'm happy to announce that Spring AI 1.0.2 has been released and is now available from Maven Central.

This patch release delivers important stability improvements and bug fixes with 91 improvements, bug fixes, and documentation updates.

Key Improvements

• New Features: GPT-5 model support, MariaDB vector similarity scores, Kotlin data class JSON schema support
• Bug Fixes: Enhanced error handling, thread-safe date formatting, improved null safety
• Documentation: Developer experience improvements and updated guides
• Dependencies: Security updates and performance improvements
…