java-spring-boot

Build production-ready Spring Boot applications with modern best practices. This skill covers Spring Boot development including REST APIs, security configuration, data access, actuator monitoring, and cloud integration. Follows Spring Boot 3.x patterns with emphasis on production readiness. Use when you need to: - Create REST APIs with Spring MVC/WebFlux - Configure Spring Security (OAuth2, JWT) - Set up database access with Spring Data - Enable monitoring with Actuator - Integrate with Spring Cloud - Auto-configuration and starters - Application properties and profiles - Bean lifecycle and configuration - DevTools and hot reload - @RestController and @RequestMapping - Request/response handling - Validation with Bean Validation - Exception handling with @ControllerAdvice - SecurityFilterChain configuration - OAuth2 and JWT authentication - Method security (@PreAuthorize) - CORS and CSRF configuration - Repository pattern - Query methods and @Query - Pagination and sorting - Auditing and transactions - Health checks and probes - Metrics with Micrometer - Custom endpoints - Prometheus integration - java-testing - Spring test patterns - java-jpa-hibernate - Data access