Bump spring-boot from 3.3.5 to 4.0.0

[dependabot]

Bumps spring-boot from 3.3.5 to 4.0.0.
Updates org.springframework.boot:spring-boot-dependencies from 3.3.5 to 4.0.0

Release notes

Sourced from org.springframework.boot:spring-boot-dependencies's releases.

v4.0.0

Full release notes for Spring Boot 4.0 are available on the wiki. There is also a migration guide to help you upgrade from Spring Boot 3.5.

⭐ New Features

• Change tomcat and jetty runtime modules to starters #48175
• Rename spring-boot-kotlin-serialization to align with the name of the Kotlinx module that it pulls in #48076

🐞 Bug Fixes

• Error properties are a general web concern and should not be located beneath server.* #48201
• With both Jackson 2 and 3 on the classpath, @JsonTest fails due to duplicate jacksonTesterFactoryBean #48198
• Gradle war task does not exclude starter POMs from lib-provided #48197
• spring.test.webclient.mockrestserviceserver.enabled is not aligned with its module's name #48193
• SslMeterBinder doesn't register metrics for dynamically added bundles if no bundles exist at bind time #48182
• Properties bound in the child management context ignore the parent's environment prefix #48177
• ssl.chain.expiry metrics doesn't update for dynamically registered SSL bundles #48171
• Starter for spring-boot-micrometer-metrics is missing #48161
• Elasticsearch client's sniffer functionality should not be enabled by default #48155
• spring-boot-starter-elasticsearch should depend on elasticsearch-java #48141
• Auto-configuration exclusions are checked using a different class loader to the one that loads auto-configuration classes #48132
• New arm64 macbooks fail to bootBuildImage due to incorrect platform image #48128
• Properties for configuring an isolated JsonMapper or ObjectMapper are incorrectly named #48116
• Buildpack fails with recent Docker installs due to hardcoded version in URL #48103
• Image building may fail when specifying a platform if an image has already been built with a different platform #48099
• Default values of Kotlinx Serialization JSON configuration properties are not documented #48097
• Custom XML converters should override defaults in HttpMessageConverters #48096
• Kotlin serialization is used too aggressively when other JSON libraries are available #48070
• PortInUseException incorrectly thrown on failure to bind port due to Netty IP misconfiguration #48059
• Auto-configured JCacheMetrics cannot be customized #48057
• WebSecurityCustomizer beans are excluded by WebMvcTest #48055
• Deprecated EnvironmentPostProcessor does not resolve arguments #48047
• RetryPolicySettings should refer to maxRetries, not maxAttempts #48023
• Devtools Restarter does not work with a parameterless main method #47996
• Dependency management for Kafka should not manage Scala 2.12 libraries #47991
• spring-boot-mail should depend on jakarta.mail:jakarta.mail-api and org.eclipse.angus:angus-mail instead of org.eclipse.angus:jakarta.mail #47983
• spring-boot-starter-data-mongodb-reactive has dependency on reactor-test #47982
• Support for ReactiveElasticsearchClient is in the wrong module #47848

📔 Documentation

• Removed property spring.test.webclient.register-rest-template is still documented #48199
• Mention support for detecting AWS ECS in "Deploying to the Cloud" #48170
• Revise AWS section of "Deploying to the Cloud" in reference manual #48163
• Fix typo in PortInUseException Javadoc #48134
• Correct section about required setters in "Type-safe Configuration Properties" #48131
• Use since attribute in configuration properties deprecation consistently #48122
• Document EndpointJsonMapper and management.endpoints.jackson.isolated-json-mapper #48115
• Document support for configuring servlet context init parameters using properties #48112
• Some configuration properties are not documented in the appendix #48095

... (truncated)

Commits

• 1c0e08b Release v4.0.0
• 3487928 Merge branch '3.5.x'
• 29b8e96 Switch make-default in preparation for Spring Boot 4.0.0
• 88da0dd Merge branch '3.5.x'
• 56feeaa Next development version (v3.5.9-SNAPSHOT)
• 3becdc7 Move server.error properties to spring.web.error
• 2b30632 Merge branch '3.5.x'
• 4f03b44 Merge branch '3.4.x' into 3.5.x
• 3d15c13 Next development version (v3.4.13-SNAPSHOT)
• dc140df Upgrade to Spring Framework 7.0.1
• Additional commits viewable in compare view

Updates org.springframework.boot:spring-boot-starter-test from 3.3.5 to 4.0.0

Release notes

Sourced from org.springframework.boot:spring-boot-starter-test's releases.

v4.0.0

Full release notes for Spring Boot 4.0 are available on the wiki. There is also a migration guide to help you upgrade from Spring Boot 3.5.

⭐ New Features

• Change tomcat and jetty runtime modules to starters #48175
• Rename spring-boot-kotlin-serialization to align with the name of the Kotlinx module that it pulls in #48076

🐞 Bug Fixes

• Error properties are a general web concern and should not be located beneath server.* #48201
• With both Jackson 2 and 3 on the classpath, @JsonTest fails due to duplicate jacksonTesterFactoryBean #48198
• Gradle war task does not exclude starter POMs from lib-provided #48197
• spring.test.webclient.mockrestserviceserver.enabled is not aligned with its module's name #48193
• SslMeterBinder doesn't register metrics for dynamically added bundles if no bundles exist at bind time #48182
• Properties bound in the child management context ignore the parent's environment prefix #48177
• ssl.chain.expiry metrics doesn't update for dynamically registered SSL bundles #48171
• Starter for spring-boot-micrometer-metrics is missing #48161
• Elasticsearch client's sniffer functionality should not be enabled by default #48155
• spring-boot-starter-elasticsearch should depend on elasticsearch-java #48141
• Auto-configuration exclusions are checked using a different class loader to the one that loads auto-configuration classes #48132
• New arm64 macbooks fail to bootBuildImage due to incorrect platform image #48128
• Properties for configuring an isolated JsonMapper or ObjectMapper are incorrectly named #48116
• Buildpack fails with recent Docker installs due to hardcoded version in URL #48103
• Image building may fail when specifying a platform if an image has already been built with a different platform #48099
• Default values of Kotlinx Serialization JSON configuration properties are not documented #48097
• Custom XML converters should override defaults in HttpMessageConverters #48096
• Kotlin serialization is used too aggressively when other JSON libraries are available #48070
• PortInUseException incorrectly thrown on failure to bind port due to Netty IP misconfiguration #48059
• Auto-configured JCacheMetrics cannot be customized #48057
• WebSecurityCustomizer beans are excluded by WebMvcTest #48055
• Deprecated EnvironmentPostProcessor does not resolve arguments #48047
• RetryPolicySettings should refer to maxRetries, not maxAttempts #48023
• Devtools Restarter does not work with a parameterless main method #47996
• Dependency management for Kafka should not manage Scala 2.12 libraries #47991
• spring-boot-mail should depend on jakarta.mail:jakarta.mail-api and org.eclipse.angus:angus-mail instead of org.eclipse.angus:jakarta.mail #47983
• spring-boot-starter-data-mongodb-reactive has dependency on reactor-test #47982
• Support for ReactiveElasticsearchClient is in the wrong module #47848

📔 Documentation

• Removed property spring.test.webclient.register-rest-template is still documented #48199
• Mention support for detecting AWS ECS in "Deploying to the Cloud" #48170
• Revise AWS section of "Deploying to the Cloud" in reference manual #48163
• Fix typo in PortInUseException Javadoc #48134
• Correct section about required setters in "Type-safe Configuration Properties" #48131
• Use since attribute in configuration properties deprecation consistently #48122
• Document EndpointJsonMapper and management.endpoints.jackson.isolated-json-mapper #48115
• Document support for configuring servlet context init parameters using properties #48112
• Some configuration properties are not documented in the appendix #48095

... (truncated)

Commits

• 1c0e08b Release v4.0.0
• 3487928 Merge branch '3.5.x'
• 29b8e96 Switch make-default in preparation for Spring Boot 4.0.0
• 88da0dd Merge branch '3.5.x'
• 56feeaa Next development version (v3.5.9-SNAPSHOT)
• 3becdc7 Move server.error properties to spring.web.error
• 2b30632 Merge branch '3.5.x'
• 4f03b44 Merge branch '3.4.x' into 3.5.x
• 3d15c13 Next development version (v3.4.13-SNAPSHOT)
• dc140df Upgrade to Spring Framework 7.0.1
• Additional commits viewable in compare view

Updates org.springframework.boot:spring-boot-starter-web from 3.3.5 to 4.0.0

Release notes

Sourced from org.springframework.boot:spring-boot-starter-web's releases.

v4.0.0

Full release notes for Spring Boot 4.0 are available on the wiki. There is also a migration guide to help you upgrade from Spring Boot 3.5.

⭐ New Features

• Change tomcat and jetty runtime modules to starters #48175
• Rename spring-boot-kotlin-serialization to align with the name of the Kotlinx module that it pulls in #48076

🐞 Bug Fixes

• Error properties are a general web concern and should not be located beneath server.* #48201
• With both Jackson 2 and 3 on the classpath, @JsonTest fails due to duplicate jacksonTesterFactoryBean #48198
• Gradle war task does not exclude starter POMs from lib-provided #48197
• spring.test.webclient.mockrestserviceserver.enabled is not aligned with its module's name #48193
• SslMeterBinder doesn't register metrics for dynamically added bundles if no bundles exist at bind time #48182
• Properties bound in the child management context ignore the parent's environment prefix #48177
• ssl.chain.expiry metrics doesn't update for dynamically registered SSL bundles #48171
• Starter for spring-boot-micrometer-metrics is missing #48161
• Elasticsearch client's sniffer functionality should not be enabled by default #48155
• spring-boot-starter-elasticsearch should depend on elasticsearch-java #48141
• Auto-configuration exclusions are checked using a different class loader to the one that loads auto-configuration classes #48132
• New arm64 macbooks fail to bootBuildImage due to incorrect platform image #48128
• Properties for configuring an isolated JsonMapper or ObjectMapper are incorrectly named #48116
• Buildpack fails with recent Docker installs due to hardcoded version in URL #48103
• Image building may fail when specifying a platform if an image has already been built with a different platform #48099
• Default values of Kotlinx Serialization JSON configuration properties are not documented #48097
• Custom XML converters should override defaults in HttpMessageConverters #48096
• Kotlin serialization is used too aggressively when other JSON libraries are available #48070
• PortInUseException incorrectly thrown on failure to bind port due to Netty IP misconfiguration #48059
• Auto-configured JCacheMetrics cannot be customized #48057
• WebSecurityCustomizer beans are excluded by WebMvcTest #48055
• Deprecated EnvironmentPostProcessor does not resolve arguments #48047
• RetryPolicySettings should refer to maxRetries, not maxAttempts #48023
• Devtools Restarter does not work with a parameterless main method #47996
• Dependency management for Kafka should not manage Scala 2.12 libraries #47991
• spring-boot-mail should depend on jakarta.mail:jakarta.mail-api and org.eclipse.angus:angus-mail instead of org.eclipse.angus:jakarta.mail #47983
• spring-boot-starter-data-mongodb-reactive has dependency on reactor-test #47982
• Support for ReactiveElasticsearchClient is in the wrong module #47848

📔 Documentation

• Removed property spring.test.webclient.register-rest-template is still documented #48199
• Mention support for detecting AWS ECS in "Deploying to the Cloud" #48170
• Revise AWS section of "Deploying to the Cloud" in reference manual #48163
• Fix typo in PortInUseException Javadoc #48134
• Correct section about required setters in "Type-safe Configuration Properties" #48131
• Use since attribute in configuration properties deprecation consistently #48122
• Document EndpointJsonMapper and management.endpoints.jackson.isolated-json-mapper #48115
• Document support for configuring servlet context init parameters using properties #48112
• Some configuration properties are not documented in the appendix #48095

... (truncated)

Commits

• 1c0e08b Release v4.0.0
• 3487928 Merge branch '3.5.x'
• 29b8e96 Switch make-default in preparation for Spring Boot 4.0.0
• 88da0dd Merge branch '3.5.x'
• 56feeaa Next development version (v3.5.9-SNAPSHOT)
• 3becdc7 Move server.error properties to spring.web.error
• 2b30632 Merge branch '3.5.x'
• 4f03b44 Merge branch '3.4.x' into 3.5.x
• 3d15c13 Next development version (v3.4.13-SNAPSHOT)
• dc140df Upgrade to Spring Framework 7.0.1
• Additional commits viewable in compare view

Updates org.springframework.boot from 3.3.5 to 4.0.0

Release notes

Sourced from org.springframework.boot's releases.

v4.0.0

Full release notes for Spring Boot 4.0 are available on the wiki. There is also a migration guide to help you upgrade from Spring Boot 3.5.

⭐ New Features

• Change tomcat and jetty runtime modules to starters #48175
• Rename spring-boot-kotlin-serialization to align with the name of the Kotlinx module that it pulls in #48076

🐞 Bug Fixes

• Error properties are a general web concern and should not be located beneath server.* #48201
• With both Jackson 2 and 3 on the classpath, @JsonTest fails due to duplicate jacksonTesterFactoryBean #48198
• Gradle war task does not exclude starter POMs from lib-provided #48197
• spring.test.webclient.mockrestserviceserver.enabled is not aligned with its module's name #48193
• SslMeterBinder doesn't register metrics for dynamically added bundles if no bundles exist at bind time #48182
• Properties bound in the child management context ignore the parent's environment prefix #48177
• ssl.chain.expiry metrics doesn't update for dynamically registered SSL bundles #48171
• Starter for spring-boot-micrometer-metrics is missing #48161
• Elasticsearch client's sniffer functionality should not be enabled by default #48155
• spring-boot-starter-elasticsearch should depend on elasticsearch-java #48141
• Auto-configuration exclusions are checked using a different class loader to the one that loads auto-configuration classes #48132
• New arm64 macbooks fail to bootBuildImage due to incorrect platform image #48128
• Properties for configuring an isolated JsonMapper or ObjectMapper are incorrectly named #48116
• Buildpack fails with recent Docker installs due to hardcoded version in URL #48103
• Image building may fail when specifying a platform if an image has already been built with a different platform #48099
• Default values of Kotlinx Serialization JSON configuration properties are not documented #48097
• Custom XML converters should override defaults in HttpMessageConverters #48096
• Kotlin serialization is used too aggressively when other JSON libraries are available #48070
• PortInUseException incorrectly thrown on failure to bind port due to Netty IP misconfiguration #48059
• Auto-configured JCacheMetrics cannot be customized #48057
• WebSecurityCustomizer beans are excluded by WebMvcTest #48055
• Deprecated EnvironmentPostProcessor does not resolve arguments #48047
• RetryPolicySettings should refer to maxRetries, not maxAttempts #48023
• Devtools Restarter does not work with a parameterless main method #47996
• Dependency management for Kafka should not manage Scala 2.12 libraries #47991
• spring-boot-mail should depend on jakarta.mail:jakarta.mail-api and org.eclipse.angus:angus-mail instead of org.eclipse.angus:jakarta.mail #47983
• spring-boot-starter-data-mongodb-reactive has dependency on reactor-test #47982
• Support for ReactiveElasticsearchClient is in the wrong module #47848

📔 Documentation

• Removed property spring.test.webclient.register-rest-template is still documented #48199
• Mention support for detecting AWS ECS in "Deploying to the Cloud" #48170
• Revise AWS section of "Deploying to the Cloud" in reference manual #48163
• Fix typo in PortInUseException Javadoc #48134
• Correct section about required setters in "Type-safe Configuration Properties" #48131
• Use since attribute in configuration properties deprecation consistently #48122
• Document EndpointJsonMapper and management.endpoints.jackson.isolated-json-mapper #48115
• Document support for configuring servlet context init parameters using properties #48112
• Some configuration properties are not documented in the appendix #48095

... (truncated)

Commits

• 1c0e08b Release v4.0.0
• 3487928 Merge branch '3.5.x'
• 29b8e96 Switch make-default in preparation for Spring Boot 4.0.0
• 88da0dd Merge branch '3.5.x'
• 56feeaa Next development version (v3.5.9-SNAPSHOT)
• 3becdc7 Move server.error properties to spring.web.error
• 2b30632 Merge branch '3.5.x'
• 4f03b44 Merge branch '3.4.x' into 3.5.x
• 3d15c13 Next development version (v3.4.13-SNAPSHOT)
• dc140df Upgrade to Spring Framework 7.0.1
• Additional commits viewable in compare view

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Summary by CodeRabbit

• Chores
  • Upgraded Spring Boot from version 3.5.9 to 4.0.0
  • Updated web and testing framework dependencies for compatibility with Spring Boot 4.0.0

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

📝 Walkthrough

Walkthrough

Upgrade Spring Boot from 3.5.9 to 4.0.0, replacing spring-boot-starter-web with spring-boot-starter-webmvc dependencies and updating corresponding test imports to reflect the new WebMvcTest package location.

Changes

Cohort / File(s)	Change Summary
Version Catalog Updates gradle/libs.versions.toml	Updated spring-boot version from 3.5.9 to 4.0.0; replaced spring-boot-starter-web and spring-boot-starter-test with spring-boot-starter-webmvc and spring-boot-starter-webmvc-test; added spring-boot plugin declaration.
Build Configuration simple-math/build.gradle	Updated dependencies: spring-boot-starter-web → spring-boot-starter-webmvc (implementation); spring-boot-starter-test → spring-boot-starter-webmvc-test (testImplementation).
Test Import Updates simple-math/src/test/java/com/craftsmanshipinsoftware/math/gui/ApplicationTest.java	Updated WebMvcTest import from org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest to org.springframework.boot.webmvc.test.autoconfigure.WebMvcTest.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 Spring Boot hops forward with version four,
From web to webmvc, and so much more!
Dependencies dance in their new home,
Test imports migrate like carrots we comb.
Version bumps bring springy new delight! 🌱

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The title states a Spring Boot version bump from 3.3.5 to 4.0.0, but the actual changes show a bump from 3.5.9 to 4.0.0, creating a discrepancy. More critically, the changes extend well beyond a simple version bump—they include replacing starter libraries (web→webmvc, starter-test→webmvc-test), updating import paths, and adding new plugin declarations. The title does not reflect these significant structural changes.	Update the title to reflect the actual version being bumped (3.5.9 to 4.0.0) and include the key structural change: 'Upgrade Spring Boot to 4.0.0 and migrate to spring-boot-starter-webmvc' or similar.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch dependabot/gradle/spring-boot-4.0.0

---

📜 Recent review details

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between f6f4176 and c948b73.

📒 Files selected for processing (3)

• gradle/libs.versions.toml
• simple-math/build.gradle
• simple-math/src/test/java/com/craftsmanshipinsoftware/math/gui/ApplicationTest.java

🔇 Additional comments (6)

gradle/libs.versions.toml (3)

19-19: LGTM!

The Spring Boot plugin declaration is correctly configured with the version reference.

---

7-7: Spring Boot 4.0.0 migration is properly configured. The codebase already uses Java 25 (configured in buildSrc), which exceeds Spring Boot 4.0.0's Java 17+ requirement and has first-class support. No deprecated APIs or problematic imports were detected. JUnit 6.0.1 is valid and compatible. No further migration verification is needed.

---

14-15: This change is correct for Spring Boot 4.0 — no action needed.

Spring Boot 4.0 introduced per-starter test starters (e.g., spring-boot-starter-webmvc-test) as part of its modularization strategy. Unlike Spring Boot 3.x where spring-boot-starter-test was the general-purpose test starter, the 4.0 design assigns a dedicated test starter to each main starter. The spring-boot-starter-webmvc-test for Boot 4.0 includes JUnit Jupiter (6.0.1), Mockito (5.20.0), AssertJ, and other core test libraries via transitive dependencies, so no functionality is lost with this replacement.

Likely an incorrect or invalid review comment.

simple-math/build.gradle (2)

8-8: LGTM!

The web starter is now renamed to spring-boot-starter-webmvc, and the dependency change correctly reflects this migration requirement.

---

10-10: Ensure webmvc-test starter provides all needed test utilities.

The change from spring-boot-starter-test to spring-boot-starter-webmvc-test aligns with the modularization in Spring Boot 4.0. However, verify that this narrower test starter still provides all the test frameworks your tests depend on (JUnit, Mockito, AssertJ, etc.), as spring-boot-starter-test was a broader starter.

Refer to the verification script in the gradle/libs.versions.toml review to confirm test dependencies.

Based on learnings from Spring Boot 4.0 modularization changes.

simple-math/src/test/java/com/craftsmanshipinsoftware/math/gui/ApplicationTest.java (1)

15-15: LGTM!

Due to modularization, each module now starts with a dedicated org.springframework.boot. package, and the import path change from org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest to org.springframework.boot.webmvc.test.autoconfigure.WebMvcTest correctly reflects this Spring Boot 4.0 package reorganization.

Based on learnings from Spring Boot 4.0 modularization changes.

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