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The 2025 release of mica-mqtt introduces 19 versions with major architecture refactoring, performance boosts via mica-net integration, multi‑protocol support, AI (MCP) capabilities, extensive plugin enhancements for Solon and Spring, and a roadmap for 2026 improvements, all documented with code snippets and repository links.
Spring Authorization Server has been integrated into Spring Security 7.0, ending its independent lifecycle; the article explains the three historical eras, the reasons for the merge, and provides concrete dependency and configuration changes—including Lambda DSL updates—to help developers migrate from SpringBoot3 to SpringBoot4 with minimal effort.
This article explains how Spring Boot 4.0’s @EnableMultiFactorAuthentication annotation simplifies the implementation of password‑plus‑one‑time‑token multi‑factor authentication, providing step‑by‑step code examples, custom token services, endpoint‑level MFA configuration, and production‑grade considerations.
Upgrading to Spring Boot 4 can cause missing @WebMvcTest, MockMvc, and other compilation errors because the framework modularizes its large autoconfigure JAR into many smaller starters, requiring updated dependencies and configuration changes to restore test execution and improve startup performance.
Discover ten practical Spring Boot configuration techniques—including YAML anchors, externalized secrets, profile groups, type‑safe properties, random values, and cloud‑aware settings—that reduce duplication, improve safety, and make multi‑environment management effortless.
The latest Spring AI 2.0 and Spring Cloud 2025.1 releases make virtual threads the default concurrency model, showing why Java 21 is essential for AI workloads, how Spring Cloud drops Reactive Kafka, adds MVC‑plus‑virtual‑thread support, and what pitfalls developers must avoid.
When Alibaba archived the popular EasyExcel library, developers faced uncertainty about future maintenance, memory usage, and JDK compatibility, prompting the emergence of FastExcel as a drop‑in replacement and the Apache‑incubated Fesod project, which together offer a high‑performance, low‑memory Java Excel processing ecosystem.
MinIO has entered maintenance mode, dropping its web console, stopping Docker image updates, and refusing new features, prompting users to migrate to RustFs—a fully compatible, Apache‑2.0 licensed S3 alternative that offers higher performance and easy Docker and Spring Boot integration.
Spring Cloud 2025.1.0 (Oakwood) marks a true major release built on Spring Boot 4.0 and Spring Framework 7, removing many legacy components, embracing Java 21 virtual threads, and integrating core features directly into the framework, fundamentally reshaping microservice development.
Spring Boot 4.0 launches with Java 17‑21 support, Jakarta EE 11, Servlet 6.1, virtual‑thread concurrency, modularization for GraalVM, new declarative HTTP client, fluent JDBC/JMS APIs, built‑in resilience annotations, and migration guidance for existing Spring Boot projects.
