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This article demonstrates how to replace cumbersome if‑else or switch‑case logic in Java receipt processing with clean, extensible solutions using the Strategy pattern combined with a Map dictionary, and the Chain of Responsibility pattern, while preserving the Open/Closed principle.
This guide walks developers through five essential Git commands—stash, reset --soft, cherry‑pick, revert, and reflog—explaining their purposes, real‑world scenarios, and step‑by‑step usage, plus tips for creating handy Git aliases to boost workflow efficiency.
Learn how to implement elegant service shutdown and startup in microservice architectures using Java's shutdown hooks, Spring Boot's built-in mechanisms, Docker container signals, and external containers like Jetty, with code examples and best‑practice strategies to avoid traffic hitting unhealthy instances.
This article explains why long if‑else chains in Java OOP are problematic and demonstrates how to use a strategy enum to encapsulate conditional logic, improving readability, extensibility, and reducing boilerplate code in backend applications.
This article explains how Lombok’s unconventional getter/setter naming for fields with a lowercase‑first, uppercase‑second pattern causes MyBatis to map enum properties as null, and how the @Accessor(chain=true) annotation in EasyExcel triggers cglib reflection issues, then provides practical workarounds for both problems.
The article examines how MyBatis applies a variety of creational, structural, and behavioral design patterns—such as Factory, Singleton, Builder, Adapter, Proxy, Composite, Decorator, Template, Strategy, and Iterator—to decouple its over‑twenty‑thousand‑line codebase, improve modularity, and handle complex ORM tasks efficiently.
This article explains why a unified API response format like ResultBean is essential for Java Spring controllers, outlines common interface design mistakes, presents controller conventions, and demonstrates an AOP solution with logging and exception handling to improve code readability and maintainability.
The article examines the role of the volatile modCount field in Java’s HashMap fail‑fast iterator, shows how its declaration changed from JDK5/6 to JDK7/8, and explains why ConcurrentModificationException can occur even in single‑threaded contexts.
This article explains MyBatis dynamic SQL, its nine XML tags, execution principle, and how to use if, where, set, choose, trim, foreach, sql, include, and association mappings for flexible query building, batch operations, and one‑to‑many, many‑to‑one, and many‑to‑many relationships.
This comprehensive Java 8 Stream tutorial explains how Stream and Lambda simplify collection processing, walks through creating streams, intermediate and terminal operations, and provides twenty practical code examples covering filtering, aggregation, mapping, collecting, grouping, sorting, and parallel execution.
