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 article introduces a Java utility class named CompressUtil that provides methods for compressing files and directories into ZIP archives, handling duplicate filenames, creating new files safely, and offering HTTP endpoints for downloading the generated ZIP files in a single request.
This article examines the typical reasons Kafka messages are lost across producers, brokers, and consumers, and provides detailed configuration recommendations and best‑practice solutions to significantly reduce the risk of data loss in distributed streaming systems.
The article explains how to achieve graceful shutdown of Spring Boot services by handling Linux kill signals, registering JVM shutdown hooks, and exposing an Actuator REST endpoint that safely releases resources, stops beans, and terminates the JVM without data loss.
This article explains the six Java thread states defined in java.lang.Thread.State, describes the meaning of each state, illustrates the possible state transitions, and provides three runnable code examples that demonstrate NEW, RUNNABLE, BLOCKED, WAITING, TIMED_WAITING and TERMINATED states along with their console outputs.
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.
