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Java Architect Handbook
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Java Architect Handbook

Focused on Java interview questions and practical article sharing, covering algorithms, databases, Spring Boot, microservices, high concurrency, JVM, Docker containers, and ELK-related knowledge. Looking forward to progressing together with you.

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Recent Articles

Latest from Java Architect Handbook

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Java Architect Handbook
Java Architect Handbook
Jul 8, 2026 · Backend Development

Why a Gateway Is Essential in Microservices and What It Actually Does

The article explains that a gateway serves as the unified entry point of a microservice system, handling routing, authentication, rate limiting, logging and protocol conversion, compares architectures with and without a gateway, details Spring Cloud Gateway's core concepts, shows configuration and custom auth filter code, and contrasts it with Zuul, providing interview‑ready insights and sample questions.

API gatewaySpring Cloud GatewayZuul Comparison
0 likes · 13 min read
Why a Gateway Is Essential in Microservices and What It Actually Does
Java Architect Handbook
Java Architect Handbook
Jul 7, 2026 · Backend Development

logback vs log4j2: Up to Double the Performance—Why It Matters

A benchmark shows log4j2 can be roughly twice as fast as logback, especially when thread count approaches twice the CPU cores, while logging method names and line numbers significantly degrade throughput; the article explains the underlying reasons, testing setup, and provides practical configuration and usage guidelines for both frameworks in Java and Spring projects.

Java loggingLogbackSpring Boot
0 likes · 16 min read
logback vs log4j2: Up to Double the Performance—Why It Matters
Java Architect Handbook
Java Architect Handbook
Jul 6, 2026 · Cloud Native

Why We Dropped Nacos for Apollo: A Hands‑On Guide to Configuration Management

This article explains why the team replaced Nacos with Ctrip's open‑source Apollo configuration center, outlines Apollo's core concepts, features, and architecture, and provides step‑by‑step instructions for creating projects, testing dynamic updates, exploring environments, clusters, namespaces, and deploying a SpringBoot application on Kubernetes.

ApolloJavaKubernetes
0 likes · 28 min read
Why We Dropped Nacos for Apollo: A Hands‑On Guide to Configuration Management
Java Architect Handbook
Java Architect Handbook
Jul 4, 2026 · Backend Development

How to Build a Clean SpringBoot Scaffold Quickly

The article walks through creating a SpringBoot project from scratch, covering IDE setup pain points, project initialization, version compatibility between SpringBoot, Spring Cloud and Kafka, Maven dependency management, core scaffold classes such as global exception handling, logging aspect, CORS and Swagger configuration, and recommends useful tools like embedded Redis, MariaDB, Hutool, MyBatis‑Plus, MapStruct and Redisson.

KafkaMapStructMaven
0 likes · 11 min read
How to Build a Clean SpringBoot Scaffold Quickly
Java Architect Handbook
Java Architect Handbook
Jul 3, 2026 · Interview Experience

Router vs Switch: Core Differences Every Interviewee Should Know

This article explains the fundamental distinctions between routers and switches—including their OSI layers, addressing methods, forwarding mechanisms, broadcast domains, performance, and typical use cases—while providing interview‑focused insights, detailed operation principles, and common follow‑up questions.

InterviewOSI modelnetworking
0 likes · 12 min read
Router vs Switch: Core Differences Every Interviewee Should Know
Java Architect Handbook
Java Architect Handbook
Jul 2, 2026 · Industry Insights

Why Facebook Dropped Git for Mercurial: Performance and Community Factors

Facebook originally used Git but switched to Mercurial around 2012 because its massive monolithic repository caused severe performance bottlenecks, especially during file stat operations, and Git’s maintainers were unwilling to improve scalability, leading the team to evaluate alternatives like Perforce before adopting Mercurial’s clearer architecture and collaborative community.

FacebookGitMercurial
0 likes · 13 min read
Why Facebook Dropped Git for Mercurial: Performance and Community Factors
Java Architect Handbook
Java Architect Handbook
Jun 30, 2026 · Backend Development

12 MyBatis‑Plus Tricks That Instantly Boost Development Efficiency

This article presents twelve practical MyBatis‑Plus techniques—including avoiding isNull checks, selecting specific fields, batch operations, EXISTS subqueries, safe ordering, LambdaQuery type safety, between clauses, index‑aware sorting, pagination limits, null‑handling, performance tracking, enum mapping, logical deletion, optimistic locking, and increment/decrement methods—to help developers write cleaner, faster, and more maintainable Java code.

Batch OperationsJavaLambdaQueryWrapper
0 likes · 18 min read
12 MyBatis‑Plus Tricks That Instantly Boost Development Efficiency
Java Architect Handbook
Java Architect Handbook
Jun 29, 2026 · Databases

Three Free Tools That Seamlessly Replace Navicat

If you need a cost‑free replacement for Navicat, this article compares three MySQL client tools—DBeaver, MySQL Workbench, and HeidiSQL—detailing their installation steps, supported databases, key features such as monitoring and ER diagrams, and practical usage tips.

DBeaverDatabase clientHeidiSQL
0 likes · 6 min read
Three Free Tools That Seamlessly Replace Navicat