Dedicated to Java tech sharing and dissecting top open-source projects. Topics include Spring Boot, Spring Cloud, Docker, Kubernetes and more. Author’s GitHub project “mall” has 50K+ stars.
The article examines unexpected bugs caused by PageHelper’s hidden LIMIT clause injection in MyBatis projects, explains how ThreadLocal pagination parameters persist across requests, and provides practical guidelines and code examples to avoid and clean up these issues.
This article walks through a real‑world case where a batch‑score query API that originally took up to 20 seconds was systematically optimized through index tuning, multithreaded execution, and request‑size limiting, ultimately achieving sub‑second response times.
The article explains why using @NotEmpty fails to detect blank strings, demonstrates the issue with a simple demo, shows the correct use of StringUtils.isBlank, and clarifies the differences between @NotNull, @NotEmpty, and @NotBlank annotations in Java validation.
This article explains the core software design principles KISS, DRY, and SOLID, shows why they matter for readability and maintainability, provides concrete Java examples and step‑by‑step guidelines, and lists actionable rules developers can follow to write cleaner, more reusable code.
This guide shows practical Linux commands—tail, less, grep, sed, and awk—illustrated with real‑world scenarios to help backend developers quickly monitor, search, filter, and extract log data during production incidents.
This comprehensive guide walks through preparing the environment, fine‑tuning core Druid pool parameters, building a robust monitoring system, strengthening security, detecting connection leaks, applying advanced runtime tweaks, and avoiding common pitfalls to achieve high performance and stability in production Spring Boot applications.
Fresh is a newly open‑source, Rust‑built terminal editor that offers a lightweight, fast, and feature‑rich experience with GUI‑like usability, multi‑platform support, zero‑delay performance, and extensibility through plugins, plus simple installation via Homebrew, Pacman, or npm.
This article objectively compares middleware‑based sharding solutions with native NewSQL distributed databases, examining their architectural differences, transaction handling, high‑availability, scaling, SQL support, storage engines, and maturity to help engineers decide which approach best fits their workload.
This guide explains multiple ways to roll back code that has already been pushed to a remote Git repository, covering manual comparison, the git revert command, creating a new branch, and using reset with force‑push while highlighting safety considerations.
IntelliJ IDEA 2025.3.1 rolls back the controversial Query File feature, fixes over 200 issues, and delivers crucial improvements for Windows + WSL, Spring, Kotlin‑MongoDB, Java debugging, terminal stability, and frontend tooling, making it a must‑upgrade for developers.
