Upgrade Spring Boot from 2.1.4.RELEASE to 2.7.18

[devin-ai-integration]

Upgrade Spring Boot from 2.1.4.RELEASE to 2.7.18

Summary

Upgraded Spring Boot parent version from 2.1.4.RELEASE to 2.7.18 as part of the Java 8 to Java 11 migration plan (Component 2: Spring Boot Framework Upgrade). This required upgrading Springfox from 2.9.2 to 3.0.0 and implementing a compatibility workaround for Spring Boot 2.6+ changes.

Key changes:

• Spring Boot: 2.1.4.RELEASE → 2.7.18 (last 2.x LTS version)
• Springfox: 2.9.2 → 3.0.0 (consolidated into springfox-boot-starter)
• Added SpringfoxConfig with BeanPostProcessor to handle Spring Boot 2.6+ PathPatternParser compatibility
• Added junit-vintage-engine for JUnit 4 test compatibility on JUnit 5 platform
• Configured spring.mvc.pathmatch.matching-strategy: ant_path_matcher for Springfox
• Updated Swagger configuration to scan only controller package

Automated testing performed:
✅ Build: mvn compile passed
✅ Tests: mvn test passed (all tests)
✅ Runtime: mvn spring-boot:run started successfully
✅ Swagger UI: Loaded correctly at http://localhost:8989/bank-api/swagger-ui/

Review & Testing Checklist for Human

⚠️ This is a major framework upgrade that requires thorough testing beyond automated checks:

• Test actual banking API operations end-to-end: Create customer, create account, deposit, withdraw, transfer funds - verify business logic still works correctly
• Verify Swagger UI completeness: Check that all expected endpoints appear in Swagger and you can execute test requests successfully. Note: URL changed from /swagger-ui.html to /swagger-ui/
• Test H2 console and other features: Verify H2 console access (/h2-console), actuator endpoints (/actuator), and any authentication/security flows work as expected

Notes

• The SpringfoxConfig uses reflection to filter handler mappings incompatible with Spring Boot 2.6+. This is a known workaround for Springfox 3.0 compatibility but should be monitored for potential issues.
• Spring Boot 2.7.18 is the last 2.x version with LTS, making it the ideal intermediate step for Java 11 migration.
• All managed Spring Boot dependencies (actuator, data-jpa, security, web, devtools) were automatically updated through the parent POM.

Link to Devin run: https://app.devin.ai/sessions/6463d6b9dffc4722b419d2e5ebc36dba
Requested by: Jaime Mizrachi (@jaime-leo)

[devin-ai-integration]

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