Sharing Java developer knowledge, practical articles, and continuous insights into computer engineering.
This guide compiles the most useful keyboard shortcuts for macOS, Chrome/Edge browsers, and IntelliJ IDEA, helping developers quickly navigate, manage files, edit code, and control applications to boost productivity and master the comfortable macOS experience.
This guide shows how to use an AI model to produce Markdown content, edit it with Typora, and then export the document as a PDF or Word file in just a few clicks using Pandoc, boosting writing efficiency for technical documentation.
Explain that “keepalive” is a concept used in both NGINX and HTTP protocol but with different meanings. In HTTP, keep‑alive (or persistent connection) is a header that allows a TCP connection to be reused for multiple requests, reducing latency. In NGINX, keepalive refers to the connection‑pool settings for upstream servers, controlling how many persistent connections are kept and their timeout.
The article explains that software on a server should be installed using the root account to place executables in system directories, while the actual processes should run under a non‑root user to limit privileges, and provides practical tips for configuring file permissions and avoiding security risks.
This guide explains how to quickly set up SpringBoot AOP, interceptor, and HandlerMethodArgumentResolver development by providing Maven dependencies, annotation definitions, code templates, usage examples, and the execution order of these components.
This guide shows how to configure Jackson in Spring Boot to consistently format LocalDateTime, Date, and String parameters as "yyyy-MM-dd HH:mm:ss", covering global settings via application properties, field-level @JsonFormat, custom serializers/deserializers, and unified handling in REST controllers.
This guide walks you through Maven installation, local repository configuration, dependency coordinates, common Maven commands, profile usage, multi‑module project setup, the difference between dependencyManagement and dependencies, and practical Maven tricks such as installing local jars, removing version numbers from generated artifacts, and resolving dependency conflicts.
This guide explains how Maven repositories and mirrors work, the role of the mirrorOf attribute, how to set up central and third‑party repositories in pom.xml, configure mirrors in settings.xml with various matching rules, and properly configure private repository deployment with authentication and profile activation.
This article consolidates essential Java date and time utilities—including start/end calculations for days, weeks, months, quarters and years, time arithmetic, formatting, parsing, and conversions between LocalDateTime, Date, and Instant—providing a handy reference for developers working with the Java Time API.
This article explores how time is represented in computers, explains historic bugs like the Y2K and the upcoming 2038 issue, clarifies GMT/UTC, time zones and daylight saving, and compares 32‑bit and 64‑bit timestamps, Java long handling, and architectural differences that affect time calculations.
