A practical Spring Boot 3 to 4 migration guide covering the real Java baseline, starter modularization, Jackson 3 as the default JSON library, Spring Security 7 defaults, virtual threads, testing breakage, and production pitfalls that most tutorials skip entirely.
A complete, hands-on guide to HTTP Service Clients in Spring Boot 4 and Spring Framework 7. Learn how to replace RestTemplate and manual WebClient boilerplate with declarative @HttpExchange interfaces, configure service groups via @ImportHttpServices, set per-group timeouts and base URLs with application.properties, test with @RestClientTest, and migrate from OpenFeign — with fully annotated production-grade code and sample output.
The runnable companion to the Spring AI 2.0 LLM gateway article: clone the module, run the tests with no API key or Docker, read the configuration, and see what the gateway answers over HTTP.
Build and test an LLM gateway on Spring AI 2.0: hint-based routing, failover that works with the new tool-calling advisor, one circuit breaker per provider, token and dollar caps, and a semantic cache. Every number comes from a run.
Learn how to configure Java RMI and Hessian remoting in Spring Boot 2 with RmiServiceExporter, HessianServiceExporter, and their proxy factory beans. Includes server and client configuration, shared interface setup, and a comparison table.
Learn how to create Spring beans using static factory methods with @Bean configuration and XML. Covers third-party class registration, profile-based implementations, construction-time validation, and JUnit testing.
Prepare for your Java interview with the top 40 Spring MVC interview questions and answers covering DispatcherServlet, annotations, REST, validation, exception handling, and more — from beginner to advanced.
ETag cache control in a Spring Boot REST API, re-verified on Spring Boot 4.1.1 and Spring Framework 7.0.9: the zero-code ShallowEtagHeaderFilter, deep caching with WebRequest.checkNotModified(), conditional PUT with If-Match, and strong vs weak ETags.
Learn how to add HTTP Basic Auth, JWT Bearer tokens, and role-based access control to Jersey JAX-RS REST APIs. Covers ContainerRequestFilter, SecurityContext, annotations, and Spring Boot integration with annotated Java code.
A complete beginner's guide to building a REST API with Spring Boot 3. Covers project setup, clean package structure, a Java record model with Bean Validation, a service layer, a @RestController with GET/POST/PUT/DELETE endpoints, global exception handling with @RestControllerAdvice, and end-to-end curl testing u2014 with fully annotated code throughout.