Focused on Java technologies: SSM, the Spring ecosystem, microservices, MySQL, MyCat, clustering, distributed systems, middleware, Linux, networking, multithreading; occasionally covers DevOps tools like Jenkins, Nexus, Docker, ELK; shares practical tech insights and is dedicated to full‑stack Java development.
This guide details a step‑by‑step process for migrating a high‑traffic MongoDB app to a dedicated instance, covering full backup, real‑time incremental sync via Change Streams, compensating for missed changes, handling operation ordering, and ensuring zero downtime throughout.
A crowd‑sourced list shows the housing fund contribution rates of major Chinese tech and internet companies, with many offering a full 12% contribution, while others provide lower percentages depending on location, contract type, or company policy.
This article explores the powerful new features introduced in JDK 17—including records, sealed classes, pattern matching, enhanced switch expressions, text blocks, and the ZGC garbage collector—showing how they simplify code, improve readability, and boost performance for modern Java development.
This article explains common security risks in login interfaces—such as brute‑force attacks, captcha bypass, account and IP lockouts, man‑in‑the‑middle threats—and provides practical mitigation techniques like password attempt limits, captcha, phone verification, HTTPS, and comprehensive logging.
This guide explains the official procedures for recovering WeChat accounts that are temporarily restricted or permanently banned, detailing verification steps, required documents, appeal channels, and tips for tracking the review process to maximize the chance of successful unblocking.
Developers often mistake the string "null" for an actual null value, leading to unexpected bugs such as phantom users, logging chaos, database contamination, and security risks; this article explains why this happens and provides practical backend, frontend, and database validation strategies to avoid the pitfalls.
This step‑by‑step guide shows how to set up a Raspberry Pi Zero W, flash Raspbian Stretch Lite, configure Wi‑Fi and SSH, optimize the system with local mirrors, install Nginx, and expose the server to the internet using ngrok, turning a credit‑card‑sized board into a functional web host.
This article explains how to design a standardized JSON response format for Java back‑end APIs, introduces a Result wrapper class, and shows how to automate response wrapping using a custom @ResponseResult annotation, interceptors, and Spring's ResponseBodyAdvice for cleaner, more maintainable code.
This tutorial walks you through adding Spring Security to a Spring Boot project, from adding the starter dependency and creating a simple controller to observing the default login page, understanding the auto‑generated password mechanism, and customizing usernames and passwords for production use.
This article explores the major Java 17 language enhancements—including records, sealed classes, pattern matching, text blocks, var, and the new switch expression—showing how they reduce boilerplate, improve readability, and boost performance compared to legacy Java 8 code.
