A highly professional Java public account
This article explains how to build a lightweight, production‑grade idempotency middleware for Spring Boot 3 using AOP, a custom @Idempotent annotation, SpEL‑generated keys, and Redis atomic operations, covering architecture, core components, code examples, use cases, and performance characteristics.
This article explains why exporting large Excel files with EasyExcel can cause OOM, CPU blockage, and slow responses, and demonstrates a pagination‑query plus batch‑write solution with reusable helper classes, performance benchmarks, dynamic page sizing, async export, multi‑sheet and template techniques, and a concise best‑practice checklist.
An in‑depth comparison of anti‑hotlinking techniques shows how Nginx can enforce protection with a single directive in milliseconds, while SpringBoot offers five approaches—Filter, Interceptor, Nginx config, signed URL, and hybrid strategy—each with different performance, security, and maintenance trade‑offs.
The article explains Minio's recent licensing shift to AGPLv3, why it matters for SaaS and proprietary software vendors, and presents five open‑source distributed storage systems—SeaweedFS, Garage, Ceph, GlusterFS, and OpenStack Swift—detailing their licenses, deployment complexity, performance characteristics, and suitable use cases.
The article explains why Druid can fail in a live Spring Boot service and provides a comprehensive, step‑by‑step optimization guide covering core pool parameters, monitoring setup, security hardening, leak detection, dynamic tuning, and best‑practice pitfalls to achieve stable, high‑performance database connections.
This article explains how to handle long‑running Spring endpoints by using three asynchronous streaming tools—ResponseBodyEmitter, SseEmitter, and StreamingResponseBody—showing their appropriate scenarios, configuration details, and complete code examples that keep the servlet thread free and avoid timeout problems.
This article demonstrates how to replace tangled if‑else login code with a clean Spring Boot solution that combines the Factory and Strategy patterns, enabling easy addition of multiple authentication methods such as password, WeChat, SMS, and future providers while improving extensibility, readability, and testability.
This article explains how Spring ApplicationEvent listeners can replace heavyweight message queues for high‑traffic scenarios, showing event class design, publishing and handling code, real‑world performance data, common pitfalls, and best‑practice guidelines for reliable asynchronous processing.
This article explains why traditional string‑search and regex methods struggle with large keyword sets, introduces the deterministic finite automaton (DFA) approach using a Trie structure for linear‑time matching, provides full Java implementations, and discusses real‑world applications and advanced optimizations such as double‑array Tries, Aho‑Corasick, and sharding with Bloom filters.
The article explains that the initial Feign request is slow because Ribbon lazily creates its client and fetches the service list at first use, and shows how enabling Ribbon’s eager‑load mode pre‑warms the client to eliminate the delay.
