How does it handle API versioning?

It utilizes native Spring Boot 4 versioning attributes within mapping annotations and provides header-based configuration patterns for cleaner API evolution.

How does it handle API error responses?

It implements the RFC 9457 ProblemDetail standard by default, ensuring your API provides structured, machine-readable error responses via @RestControllerAdvice.

Does it support both Java and Kotlin?

Yes, the patterns and examples are designed to work with both Java and Kotlin Spring Boot implementations.

Can I use this for reactive programming?

Absolutely. The skill provides specific implementation patterns for Spring WebFlux, high-concurrency streaming, and R2DBC reactive database integration.

Does this skill support Spring Boot 4 features?

Yes, it specifically includes support for Spring Boot 4 updates such as Jackson 3 (tools.jackson package), @MockitoBean, and native API versioning.

Spring Boot Web API Patterns

Name: Spring Boot Web API Patterns
Author: joaquimscosta

byjoaquimscosta

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API Development

Implements production-grade RESTful APIs using Spring Boot 4 standards, including MVC, WebFlux, and RFC 9457 error handling.

About

This skill provides comprehensive guidance for building modern Spring Boot 4 web layers, ensuring strict adherence to the latest ecosystem standards like Jackson 3 and Bean Validation 3.1. It streamlines the creation of REST controllers, helps developers choose between imperative (MVC) and reactive (WebFlux) stacks, and enforces industry best practices such as native API versioning and standardized error responses via ProblemDetail. Ideal for developers building scalable microservices, it provides a structured approach to DTO mapping, validation, and automated testing with modern tools like @MockitoBean.

Key Features

Standardized RFC 9457 ProblemDetail error handling
Modernized testing setups with @WebMvcTest and @MockitoBean
Native API versioning and content negotiation
Spring Boot 4 MVC and WebFlux implementation patterns
Request validation using Bean Validation 3.1
3 GitHub stars

Use Cases

Building high-concurrency reactive APIs using Spring WebFlux and R2DBC
Migrating legacy Spring Boot applications to Spring Boot 4 and Jackson 3
Implementing standardized global exception handling across microservices

About

Key Features

Standardized RFC 9457 ProblemDetail error handling
Modernized testing setups with @WebMvcTest and @MockitoBean
Native API versioning and content negotiation
Spring Boot 4 MVC and WebFlux implementation patterns
Request validation using Bean Validation 3.1
3 GitHub stars

Use Cases

Building high-concurrency reactive APIs using Spring WebFlux and R2DBC
Migrating legacy Spring Boot applications to Spring Boot 4 and Jackson 3
Implementing standardized global exception handling across microservices