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 explains why Spring Boot 3 is incompatible with Swagger 2, shows how to downgrade or replace dependencies, updates servlet imports, adjusts Maven and application settings, and provides a complete Swagger configuration to get the API docs running again.
This tutorial explains how to automate Excel data extraction in Java using the free Free Spire.XLS library, covering installation, core classes and methods, and detailed code examples for reading a single cell, a cell range, and an entire worksheet, enabling efficient batch processing and integration with other systems.
This guide shows how to generate Excel dropdown lists programmatically in Java using the free Spire.XLS library, covering two approaches—direct string arrays and cell‑range data sources—complete with sample code and screenshots.
This comprehensive 2025 guide walks users through identifying restriction types, preparing evidence, using WeChat's self‑service unlocking tools or web‑based appeal, completing assisted verification, handling enterprise account checks, and applying best‑practice safeguards to maximize the chance of successful account restoration.
This tutorial shows how to set up the Spire.OCR library in Java, configure dependencies, and write code that scans images to extract their text, complete with Maven setup, project configuration, and sample output.
This tutorial explains how to programmatically add headers and footers—including text, images, page numbers, and separator lines—to every page of a PDF using Java and the free Spire.PDF library, with complete code examples and visual results.
This article demonstrates how to integrate Spring Security into a Spring Boot application, configure JWT‑based authentication, implement custom AES encryption, define user and role entities, set up service and controller layers, and configure security, filter, and CORS settings to achieve secure login and permission management.
This article explains how to build a robust order service using Seata distributed transactions, Redisson distributed locks, CompletableFuture for asynchronous operations, token-based duplicate‑submission prevention, and RabbitMQ delayed queues for automatic order cancellation, with full Java code examples.
This guide explains how to build a Nacos service cluster, configure providers and consumers, write the necessary Spring Cloud Nacos YAML and Java controller code, detail the steps for setting up multiple Nacos nodes, and troubleshoot typical startup errors.
This article provides a comprehensive overview of ZooKeeper, covering its purpose as a distributed coordination service, design objectives such as consistency and reliability, hierarchical data model, session and watch mechanisms, consistency guarantees, leader election and Zab protocol, as well as practical deployment details.
