Sharing Java developer knowledge, practical articles, and continuous insights into computer engineering.
This tutorial walks you through API protocol types, Swagger/OpenAPI documentation setup, advanced configuration, environment‑specific activation, UI enhancement with Knife4j, and practical versioning strategies to efficiently manage and evolve your backend APIs.
This article explains why Swagger falls short for API debugging in production, outlines the recurring issues developers face, and shows how Apifox’s import, environment variables, global parameters, pre‑ and post‑scripts, mock data, and cURL import features streamline API development and testing.
This article explores how to apply core design patterns—Observer, Factory, Proxy, and Template Method—in Java middleware development, illustrating each pattern with practical code snippets and explaining the design rationale for building maintainable, extensible, and flexible services.
This article explains what a logging service is, compares ELK and custom appender solutions, shows how to create a Logback appender by extending AppenderBase, provides a complete Java example with configuration, and demonstrates the custom appender in action for backend developers.
This guide explains how to create a Bash script that monitors a Jenkins Docker container, automatically restarts it when it stops, grant the script execution rights, and schedule it with cron to run every ten seconds, eliminating manual docker restart commands.
This guide explains why every server must monitor CPU, memory, disk and network usage, shows how to clean disks and analyze traffic using command‑line utilities such as df, du, iotop, iostat, iftop, lsof and tcpdump, and provides real‑world case studies for troubleshooting disk space exhaustion, port conflicts and abnormal outbound traffic.
This guide walks through the fundamentals of DevOps, illustrating how to transition from simple command‑line deployments to sophisticated, automated CI/CD pipelines using Jenkins, Docker, and shell scripts, while covering JVM tuning, version management, and common troubleshooting tips.
This guide walks through capturing a third‑party QR‑code login flow with Charles, converting the captured requests to cURL, analyzing them in Apifox, and reproducing the entire process to embed external platform authentication into a custom web and mobile application.
This guide walks through practical RBAC design using Sa-Token, providing MySQL table schemas for users, roles, permissions, sample data, and Spring Boot API code for authentication, authorization checks, and retrieving the logged‑in user's details.
This beginner-friendly guide explains core authentication mechanisms, the OAuth2.0 flow, token types, the role of refresh tokens, JWT pitfalls, and RBAC design, providing a solid foundation for secure backend development.
