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This article provides a comprehensive guide to MyBatis dynamic SQL tags—including foreach, if, choose, trim, and selectKey—showing how to configure XML, handle collections, build flexible queries, and avoid common pitfalls when generating SQL statements.
This article explains why using IN and NOT IN in SQL queries often leads to poor performance and incorrect results, and demonstrates safer alternatives such as EXISTS, NOT EXISTS, and JOINs with practical code examples.
This article presents fourteen actionable Java coding‑style and architecture tips—ranging from using configuration properties and Lombok constructors to modularizing methods, throwing exceptions, reducing DB calls, avoiding null returns, and leveraging IDE suggestions—to help developers write cleaner, more robust backend code.
This article explains a typical Git workflow—including dev, test, UAT, and production branches—covers challenges of parallel version development, and compares merge and rebase strategies to help teams maintain clean commit histories and reliable releases.
This article explains what MySQL binlog is, how it enables master‑slave replication, and explores practical business applications such as data heterogeneity, cache synchronization, and task distribution, while highlighting performance considerations and the benefits of using binlog‑based middleware.
This article explains the hidden pitfalls of Lombok’s @Builder annotation, demonstrates how it deviates from the classic Builder pattern, and presents safer alternatives such as @Accessors with practical code examples and guidance for mixing required and optional parameters in Java projects.
This guide walks developers through five practical Git commands—stash, reset --soft, cherry-pick, revert, and reflog—explaining their purpose, typical scenarios, step‑by‑step usage, conflict handling, and how to create short aliases for faster workflow.
This article explains three Redis‑based rate‑limiting approaches—using SETNX for simple counters, ZSET for sliding‑window limits, and a token‑bucket algorithm with List—providing Java code examples and discussing their advantages and drawbacks.
A real‑world MySQL case study shows how using INSERT INTO SELECT for large data migrations can trigger full‑table scans, lock contention, and massive data loss, emphasizing the need for proper indexing and careful testing before deployment.
This article compiles a comprehensive set of Linux command‑line shortcuts covering system shutdown, reboot, hardware and CPU info, file and directory management, user and permission handling, networking tools, process monitoring, and performance diagnostics, providing a handy reference for anyone working in a terminal‑heavy environment.
