Former Ant Group P8 engineer, pure technologist, sharing full‑stack Java, job interview and career advice through a column. Site: java-family.cn
This tutorial shows how to replace heavyweight Spring Security with the lightweight Sa-Token framework by demonstrating token generation, configuration, gateway filtering, role‑based access control, and asynchronous permission fetching for a Spring Cloud microservices architecture.
This article explains the fundamentals and practical applications of major permission models—including ACL, DAC, MAC, ABAC, and RBAC—detailing their principles, examples, advantages, drawbacks, and how to implement them effectively in real-world systems.
This article walks through the design and implementation of a Java rule engine, illustrating how to abstract rules, create a reusable executor with AND/OR logic, and demonstrates the full code, while discussing its advantages, drawbacks, and practical usage in real‑world applications.
This article explains the hidden pitfalls of Lombok’s @Builder annotation, why it often violates the Builder pattern, and presents @Accessors and manual fluent setters as safer, more flexible alternatives for Java backend development.
This article presents seven practical Spring Boot performance tuning techniques—including asynchronous execution, Tomcat connection tuning, component scanning, switching to Undertow, BufferedWriter usage, DeferredResult handling, and AsyncHandlerInterceptor interception—each illustrated with concise Java code examples to help developers boost application speed and scalability.
SpringBoot 3.0 removed the traditional spring.factories file to improve startup performance, modularity, and GraalVM native image support, and introduces a new imports‑based registration mechanism with detailed migration steps, code examples, and best‑practice guidance for developers.
This article explains the fundamentals of hexagonal (ports‑and‑adapters) architecture, presents three ways to implement it in Spring Boot—including a classic version, a DDD‑enhanced version, and a simplified variant—while analyzing their advantages, disadvantages, and suitable scenarios.
This article introduces the lightweight OKHttpUtil wrapper for Java and Kotlin, outlines its key features such as automatic protocol detection, cookie handling, proxy and header configuration, GZIP decompression, and Spring Boot integration, and provides comprehensive code examples for GET, POST, file upload, download, chained requests, and custom API client creation.
This guide explains how to integrate Prometheus with Spring Boot using Actuator and Micrometer, configure Docker containers, set up Grafana for visualization, and create custom metrics, providing a complete monitoring solution for microservice applications.
This article explains how Domain‑Driven Design (DDD) complements microservice architecture by addressing functional partitioning gaps, guiding system decomposition, and improving scalability, while also highlighting common microservice pitfalls and practical steps for clear bounded‑context modeling.
