refactor: Fixes #947 Update Spring Boot version , Spring AI version, organize imports

[ddobrin]

Update Spring Boot version to 4.0.2, update Spring AI to 2.0.0-M2, organize corresponding imports.

Note: Jackson has a minor update from 2.19.0 to 2.20.0.
Spring Boot 4.x uses Jackson 3, however with switching to the jackson-bom the major version remains the same

Modeuls updated:

• /dev
• /contrib/spring-ai

[gemini-code-assist]

Summary of Changes

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This pull request focuses on essential dependency upgrades and compatibility adjustments to keep the project current with the latest Spring ecosystem. It primarily updates Spring Boot, Spring AI, and Jackson versions, streamlining dependency management and ensuring the application remains stable and performant with newer framework releases. These changes are crucial for leveraging new features, security patches, and performance improvements offered by the updated libraries.

Highlights

• Spring Boot Version Update: The project's core Spring Boot dependency has been upgraded from version 3.4.1 to 4.0.2, reflecting a significant framework update.
• Spring AI Version Update: The Spring AI integration module has been updated to version 2.0.0-M2, bringing the latest features and improvements from the Spring AI project.
• Jackson Dependency Management Refinement: Jackson dependencies have been updated to version 2.20.2 and are now managed via the jackson-bom (Bill of Materials), simplifying dependency declarations and ensuring consistent versions across modules. Individual Jackson dependencies were removed as they are now implicitly managed by the BOM.
• Spring Boot 4.x Compatibility Adjustments: To align with Spring Boot 4.x changes, the spring-boot-starter-webmvc-test dependency was added, and import statements for AutoConfigureMockMvc were updated to reflect its new package location.

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Changelog

• contrib/spring-ai/pom.xml
  • Updated the spring-ai.version property from 1.1.0 to 2.0.0-M2.
• dev/pom.xml
  • Added spring-boot-starter-webmvc-test as a test-scoped dependency.
• dev/src/test/java/com/google/adk/web/AdkWebServerTest.java
  • Updated the import statement for AutoConfigureMockMvc to its new package org.springframework.boot.webmvc.test.autoconfigure.AutoConfigureMockMvc.
• dev/src/test/java/com/google/adk/web/AdkWebServerUITest.java
  • Updated the import statement for AutoConfigureMockMvc to its new package org.springframework.boot.webmvc.test.autoconfigure.AutoConfigureMockMvc.
• pom.xml
  • Updated the spring-boot.version property from 3.4.1 to 4.0.2.
  • Updated the jackson.version property from 2.19.0 to 2.20.2.
  • Added jackson-bom to the dependencyManagement section to manage Jackson dependencies centrally.
  • Removed individual Jackson core, annotations, databind, datatype-jdk8, datatype-jsr310, and dataformat-yaml dependencies from dependencyManagement, as they are now managed by jackson-bom.

Activity

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Code Review

This pull request successfully updates the Spring Boot version to 4.0.2, Spring AI to 2.0.0-M2, and Jackson to 2.20.2. The changes correctly reflect these version bumps across the pom.xml files, including the adoption of jackson-bom for streamlined dependency management. The corresponding import statement adjustments in the test files (AdkWebServerTest.java and AdkWebServerUITest.java) are also correctly applied, ensuring compatibility with the new Spring Boot version. Overall, the changes are well-executed and align with the stated objective of modernizing the project's dependencies.