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java1234

Former senior programmer at a Fortune Global 500 company, dedicated to sharing Java expertise. Visit Feng's site: Java Knowledge Sharing, www.java1234.com

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Latest from java1234

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java1234

Mar 17, 2026 · Backend Development

Understanding the Core Mechanism Behind Spring Event Listening

The article explains Spring’s event-driven model, detailing how ApplicationEventPublisher, ApplicationListener, and ApplicationEventMulticaster work together to publish, multicast, and handle events, and provides code examples for defining custom events, implementing listeners via interfaces or @EventListener annotations, and configuring asynchronous handling.

ApplicationEventPublisherJavaSpring

0 likes · 6 min read

Understanding the Core Mechanism Behind Spring Event Listening

java1234

Mar 15, 2026 · Backend Development

BeanFactory vs ApplicationContext in Spring: Key Differences Explained

This article compares Spring's BeanFactory and ApplicationContext, detailing their roles, loading strategies, feature sets, code examples, and recommended usage scenarios, helping developers choose the appropriate container for their projects.

ApplicationContextBeanFactoryDependency Injection

0 likes · 6 min read

BeanFactory vs ApplicationContext in Spring: Key Differences Explained

java1234

Mar 13, 2026 · Backend Development

JEnv: A Next‑Gen Java Environment Manager that Simplifies Multi‑Version Management

JEnv tackles the long‑standing pain of juggling multiple Java versions by delivering sub‑second scanning (400 ms on a full‑depth scan), a concurrent Dispatcher‑Worker engine, smart pre‑filtering, cross‑platform support, themed terminals, real‑time statistics, and a modular architecture, all demonstrated with concrete benchmarks and usage scenarios.

CLICross-platformJava

0 likes · 9 min read

JEnv: A Next‑Gen Java Environment Manager that Simplifies Multi‑Version Management

java1234

Mar 12, 2026 · Databases

Understanding Redis Operation Atomicity: Concepts, Transactions, and Optimistic Locks

The article explains how Redis guarantees atomic operations through single‑command atomicity, MULTI/EXEC transactions, and the WATCH optimistic‑lock mechanism, providing Java/Jedis code examples and discussing their role in ensuring data consistency in distributed systems.

AtomicityJavaJedis

0 likes · 6 min read

Understanding Redis Operation Atomicity: Concepts, Transactions, and Optimistic Locks

java1234

Mar 10, 2026 · Backend Development

What’s the Difference Between MyBatis First‑Level and Second‑Level Caches?

This article explains the concepts, characteristics, default states, and usage patterns of MyBatis first‑level (SqlSession) and second‑level (Mapper) caches, provides Java code demos for each, and compares their scope, lifecycle, consistency, and suitable scenarios.

CacheJavaMyBatis

0 likes · 7 min read

What’s the Difference Between MyBatis First‑Level and Second‑Level Caches?

java1234

Mar 8, 2026 · Backend Development

How to Build a Custom MyBatis Plugin: Step-by-Step Guide

This article explains the MyBatis plugin mechanism, walks through implementing the Interceptor interface, configuring the plugin in mybatis-config.xml, provides a complete code example, and outlines common use cases such as SQL logging, performance monitoring, permission control, and automatic field filling.

InterceptorJavaMyBatis

0 likes · 6 min read

How to Build a Custom MyBatis Plugin: Step-by-Step Guide

java1234

Mar 7, 2026 · Fundamentals

Merge or Rebase? The Ultimate Guide to Git Merge Strategies

This article compares Git's merge and rebase commands by walking through a realistic two‑developer scenario, illustrating fast‑forward versus non‑fast‑forward merges, conflict resolution differences, commit‑history rewrites, and practical recommendations on when to choose each approach.

Conflict ResolutionGitmerge

0 likes · 6 min read

Merge or Rebase? The Ultimate Guide to Git Merge Strategies

java1234

Mar 3, 2026 · Backend Development

How MyBatis Plugins Execute: Core Interface and Runtime Flow

This article explains MyBatis’s plugin mechanism, detailing the Interceptor interface methods, how plugins form an interceptor chain to wrap core components like Executor, and provides a step‑by‑step example of a logging plugin with code and configuration, illustrating the runtime flow and extension capabilities.

InterceptorJavaMyBatis

0 likes · 7 min read

How MyBatis Plugins Execute: Core Interface and Runtime Flow

java1234

Mar 3, 2026 · Backend Development

One‑Line Java Time Tracker: Millisecond Precision and Up to 300% Faster Performance

The article shows how to replace repetitive System.currentTimeMillis() timing code with a concise TimeTracker utility that leverages try‑with‑resources, functional interfaces, and flexible exception handling to achieve millisecond‑level measurement and dramatically improve code readability and performance.

Functional InterfaceJavaTimeTracker

0 likes · 13 min read

One‑Line Java Time Tracker: Millisecond Precision and Up to 300% Faster Performance

java1234

Mar 1, 2026 · Artificial Intelligence

Boost Your Coding Speed: Must‑Try AI Plugins for IntelliJ IDEA

This article reviews the most popular AI‑powered coding plugins for IntelliJ IDEA, detailing their features, ideal scenarios, installation steps, advantages, limitations, and practical effects, and provides a comparison table and recommended tool combinations for different development needs.

AI codingAmazon CodeWhispererCodeGeeX

0 likes · 7 min read

Boost Your Coding Speed: Must‑Try AI Plugins for IntelliJ IDEA