Focused on Java interview questions and practical article sharing, covering algorithms, databases, Spring Boot, microservices, high concurrency, JVM, Docker containers, and ELK-related knowledge. Looking forward to progressing together with you.
This guide shows how to use Canal to capture MySQL binlog changes, forward them through RabbitMQ, and process them in a SpringBoot application, providing a clean, decoupled way to record both new and old data for insert, update, and delete operations.
IntelliJ IDEA 2026.1 EAP 3 introduces a long‑awaited feature that sends deleted files to the system recycle bin instead of permanently erasing them, addressing a six‑year‑old issue, comparing it with other editors, outlining its advantages, and summarizing dozens of other notable IDE improvements.
This article recounts a developer’s experience joining a small logistics startup in 2022, detailing the initial technology selection of uni‑app, egg.js, MySQL and antd‑vue, the subsequent adjustments, hiring and team‑management challenges, and practical advice for avoiding common pitfalls in early‑stage companies.
This article breaks down the interview focus points, core answer, deep analysis, code examples, and common pitfalls for ensuring RocketMQ messages never get lost, covering producer, broker, and consumer configurations, trade‑offs, and practical troubleshooting steps.
This guide walks you through a fully open‑source, pure‑Java solution for converting uploaded .docx files to PDF in a Spring Boot application, covering library selection, Maven dependencies, a reusable utility class, controller implementation, and handling Chinese font issues on Windows and Linux.
This article breaks down the interview focus points, core solution framework, underlying RocketMQ mechanisms, step‑by‑step remediation actions, common pitfalls, and a concluding strategy for handling message backlog through emergency scaling, consumer optimization, degradation, dead‑letter handling, and proactive capacity planning.
This guide explains how to integrate the asyncTool library into a Spring Boot project, configure custom thread pools, understand core interfaces like IWorker and ICallback, and use the provided Builder API to define serial, parallel, and mixed task flows with detailed code examples and best‑practice cautions.
This article explains how RocketMQ’s consumer model is fundamentally pull‑based with a long‑polling optimization that provides a push‑like experience, covering interview focus points, detailed mechanism, code examples, best practices, and common misconceptions.
This article walks through a real‑world data‑migration case where 100,000 rows were moved from an old system to a new one, showing how naive per‑row inserts took five minutes and how a series of optimizations—batch SQL, JDBC batch mode, and multithreaded parallelism—reduced the runtime to just three seconds, while also covering common pitfalls and the final high‑performance implementation.
The article analyzes why interviewers at large tech firms ask increasingly detailed questions that may end without feedback, contrasts this with small‑company interview tactics, explains the mismatch, and offers concrete strategies for Java developers to handle such “soul‑crushing” queries effectively.
