Focused on Java technologies: SSM, the Spring ecosystem, microservices, MySQL, MyCat, clustering, distributed systems, middleware, Linux, networking, multithreading; occasionally covers DevOps tools like Jenkins, Nexus, Docker, ELK; shares practical tech insights and is dedicated to full‑stack Java development.
This tutorial demonstrates three methods to read YML configuration in SpringBoot — using @Value annotations, the Environment abstraction, and @ConfigurationProperties binding — with complete code examples for each approach.
This article compares four Java approaches for calling WebServices — Axis2 code generation, RPC, HttpURLConnection, and HttpClient — detailing pros, cons, code samples, and a real-world namespace mismatch issue when integrating with C-based services.
A shared WXG first-round interview experience lists 60 questions covering self-introduction, algorithms (IP-to-uint64, linked-list folding, uniform sampling), system design, AI tools, large-model hallucinations, RAG, vector search, collaborative filtering, 12306 ticketing architecture, Redis internals, MySQL B+ trees, concurrency locks, and design patterns.
This tutorial explains Spring AOP using annotations, covering core concepts like join points, pointcuts, and advice types (before, after, around, etc.), with detailed examples of pointcut expressions and how to access method parameters, return values, and exceptions in advice methods.
This tutorial shows two standard Java approaches for loading a jdbc.properties file: using ClassLoader.getResourceAsStream with Properties, and using ResourceBundle.getBundle, each with complete code examples and output verification.
This tutorial covers Java's three main IO stream types—byte, character, and conversion streams—demonstrating low-level vs high-level stream performance with file copy benchmarks, text file processing, console input handling, and character encoding conversion solutions.
A Tencent architect with nearly ten years experience shares principles for simple, evolvable architecture: modularization, layering, focusing on core business needs like QQ's social chat, avoiding premature optimization, service design with monitoring and canary releases, and code design with clear structure and single responsibility.
This article details seven common MySQL index failure scenarios—including leftmost prefix violations, function usage on indexed columns, implicit type conversion, leading wildcards in LIKE, OR with non-indexed columns, IS NOT NULL, and NOT IN/EXISTS—with concrete SQL examples showing both failing and optimized queries.
This article explains five common Java memory leak scenarios—long-lived collections, unclosed resources, ThreadLocal misuse, inner class references, and unregistered listeners—with code examples and recommends MAT and VisualVM for leak detection.
This article explains how placing filter conditions in ON versus WHERE clauses affects MySQL JOIN results, demonstrating with concrete examples that INNER JOIN behaves equivalently while LEFT JOIN preserves driving table rows only when conditions are in ON, with SQL code and result comparisons.
