Focus on Java-related technologies: SSM, Spring ecosystem, microservices, MySQL, MyCat, clustering, distributed systems, middleware, Linux, networking, multithreading. Occasionally cover DevOps tools like Jenkins, Nexus, Docker, and ELK. Also share technical insights from time to time, committed to Java full-stack development!
MyPerf4J is a high‑throughput, low‑latency Java performance monitoring tool that uses a non‑intrusive JavaAgent to collect real‑time method, memory, GC, and class metrics, offering developers quick bottleneck detection in development and continuous observability in production.
This comprehensive guide explores the most powerful Spring Boot capabilities—including @Conditional, @ConfigurationProperties, Actuator, DevTools, Retry, Cache, testing strategies, custom starters, Admin, and CLI—providing code examples and deep analysis to help developers boost productivity, reliability, and maintainability of their applications.
This article presents ten practical MySQL techniques—from using JSON columns for flexible data to leveraging CTEs, window functions, and advanced clauses like WITH ROLLUP and INSERT IGNORE—each illustrated with real‑world scenarios and ready‑to‑run SQL code to improve query efficiency and developer productivity.
Spring Boot 4.0 RC1 removes Undertow support because it cannot meet the Servlet 6.1 baseline, forcing developers to migrate web containers, and the article explains the technical reasons, new Servlet 6.1 features, Jakarta EE 11 changes, compatibility matrix, and migration guidance.
This article explains why using LIMIT on sharded tables can crash databases, then introduces three practical pagination tricks—anchor pagination, shard‑mark method, and reverse pagination—detailing their workflows, performance benefits, and common pitfalls for backend developers.
Spring announced that RestTemplate will be deprecated in Spring Framework 7.0 and removed later, outlining a migration path to the newer RestClient for synchronous use and WebClient for reactive scenarios, while providing a timeline and practical guidance for developers.
This article explains how Lombok’s automatic getter/setter generation can cause MyBatis to store enum fields as null, details the underlying JavaBeans naming conflict, and also reveals why EasyExcel fails with @Accessor(chain=true) annotations, offering practical solutions for both problems.
The article examines Meituan’s pioneering use of AI interviewers and the NoCode product, explains the emerging “Vibe Coding” approach, and argues that future software engineering interviews should assess candidates’ ability to collaborate with AI tools rather than merely memorizing algorithms.
This article explains how Java's BigDecimal class maintains exact decimal precision by scaling numbers to integers, detailing its internal fields, the add method implementation, and a concrete example that demonstrates the underlying computation steps.
This article explains how to handle JSON objects with unknown or dynamic fields in Java using Jackson's @JsonAnySetter to collect extra properties into a Map and @JsonAnyGetter to serialize them back as regular fields, complete with practical code examples and common pitfalls.
