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!
Using the literal string "null" as a username can cause validation failures, database pollution, security risks, and endless debugging, but with proper checks, front‑end validation, database constraints, and clear logging you can avoid these hidden bugs.
This article explains Java 8's functional interfaces—including Function, Supplier, Consumer, and Runnable—showing how to replace verbose if‑else and exception handling with concise lambda expressions, and provides reusable utility interfaces for branching, present‑or‑else logic, and exception throwing.
Feat is a high‑performance Java web service framework that offers a SpringBoot‑like development experience while delivering faster startup, lower memory usage, higher request throughput, and built‑in AI‑native and cloud‑native capabilities, making it a compelling alternative for modern backend development.
This article explains how to handle downstream API rate limits that differ per platform by interleaving requests with a weighted round‑robin algorithm, shows the pitfalls of simple sleep‑based throttling, and provides complete Java code for a practical implementation.
This article explains Java's reverse domain naming convention, shows a typical Maven project layout, and outlines how using reversed domain prefixes in package names prevents naming conflicts, ensures global uniqueness, enhances readability, and supports logical layering of code modules.
This article explains what IT outsourcing is, compares two‑party and three‑party contracts, outlines the advantages and disadvantages for developers, and offers practical advice on selecting the right outsourcing role based on career goals, salary expectations, and learning opportunities.
Jeandle, the new open‑source LLVM‑based JIT compiler released by Ant Group, aims to boost Java performance by integrating LLVM’s optimization capabilities into the JVM, explaining JIT and LLVM fundamentals, its architecture, and an ambitious roadmap toward full bytecode support and advanced optimizations.
The MyBatis SQL Viewer plugin streamlines MyBatis development by converting XML to real SQL, offering parameter mocking, compliance and index checks, execution, stress testing, and both MyBatis and non‑MyBatis modes, all without repeatedly restarting the application.
This article introduces JDFrame, a JVM‑level DataFrame‑style library that provides a more expressive, SQL‑like API for Java 8 streams, shows how to add the Maven dependency, demonstrates common operations such as filtering, grouping, sorting, joining, and explains the differences between SDFrame and JDFrame with practical code examples.
This article explains the key differences between Java's Stream toList() method introduced in JDK 16, which returns an unmodifiable list, and the traditional collect(Collectors.toList()) which yields a mutable ArrayList, illustrating behavior with code examples, performance considerations, and practical usage tips.
