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 several practical methods—including manual comparison, git revert, creating a new branch, and various git reset options—to safely roll back code that has already been pushed to a remote repository, while also covering force‑push considerations.
This article introduces an open‑source Java JSON framework that uses recursive parsing and reflection to serialize and deserialize objects without third‑party libraries, supports generic and array types, and provides extensible features such as custom annotations, JsonPath, and HTML‑safe output.
This article demonstrates how to automate CRUD functionality in a Spring Boot application by adding MyBatisPlus, creating utility methods for query building and reflection, implementing a generic BaseController, configuring pagination support, and extending the controller for specific entities, providing a reusable RESTful API template.
This tutorial demonstrates how to add Apache POI dependencies via Maven and use Java code to create an Excel workbook containing a multi‑series temperature line chart, including custom font sizes for titles and axes, and finally export the file to disk.
This guide demonstrates how to set up Docker‑based MySQL instances, configure ShardingSphere‑Proxy for database sharding and read‑write splitting, and integrate ShardingSphere‑JDBC with SpringBoot 2.x using YAML configurations and Maven dependencies, providing complete code snippets and default connection details.
The article explains how IntelliJ creates a debug session via XDebuggerManager.startSessionAndShowTab, the role of XDebugSession and XDebugProcess, and details the sequence of events and listeners involved when the session is stopped, including process termination and listener cleanup.
This article explains the concept of rate limiting, introduces common algorithms such as token bucket and leaky bucket, and provides a complete Spring‑Boot implementation using Redis, custom annotations, AOP, and utility classes for distributed request throttling.
This article explains how to extract AOP annotation code, implements a Redis-based rate limiter using Redisson in Java, analyzes the underlying Lua script, and extends the utility to support automatic expiration of the limiter, providing complete code examples and detailed explanations.
This article describes a utility method that leverages Java reflection and generics to automatically generate a MyBatis-Plus QueryWrapper from a DTO, handling field‑name mapping, type‑specific query conditions, and camel‑to‑snake case conversion for seamless database queries.
This tutorial walks through preparing the environment, installing and uninstalling MySQL on CentOS 7, configuring firewalls, setting up remote access, handling character sets, adjusting security policies, managing SQL modes, and best practices for case sensitivity and version‑specific password policies.
