Former Ant Group P8 engineer, pure technologist, sharing full‑stack Java, job interview and career advice through a column. Site: java-family.cn
This guide walks you through designing a scalable login module that supports dozens of authentication methods by combining the Strategy and Factory patterns with Spring Boot, providing clean code, easy extensibility, and robust testing without the tangled if‑else spaghetti.
This guide explains why MySQL or Java services can suddenly consume 900% CPU, outlines step‑by‑step diagnostics using Linux tools, and provides concrete optimization actions such as killing offending queries, adding indexes, tuning caches, and fixing Java thread loops.
This article explains why traditional SpringBoot logging falls short, introduces the Hera log platform’s three core benefits, outlines a layered integration architecture, and provides a detailed five‑step guide—including Maven dependencies, YAML configuration, custom field providers, log output, traceability, and console usage—plus performance, high‑availability, security tips and common pitfalls.
This guide explains the concept of multi‑DataSource coexistence, when it is appropriate, step‑by‑step configuration for MySQL and TDengine, transaction manager handling, custom annotations, mapper scanning, differences from dynamic routing, common pitfalls, and best‑practice usage in a Spring‑MyBatis backend.
This guide walks you through practical command‑line techniques—using grep, tail, less, and related options—to efficiently locate Java exceptions in log files, view surrounding context, monitor live logs, search compressed archives, and quickly count occurrences, all without opening files manually.
This article examines several engineering solutions for extracting up to 100,000 records from a ten‑million‑row pool, comparing multi‑threaded ClickHouse pagination, Elasticsearch scroll‑scan, an ES‑plus‑HBase hybrid, and RediSearch + RedisJSON, and presents performance measurements and practical trade‑offs.
This article explains how using JSON Schema as a single source of truth can drive both front‑end rendering and back‑end validation in Java SpringBoot applications, eliminating duplicated validation logic, reducing maintenance costs, and enabling dynamic, versioned forms with real‑time user feedback.
This article explains a Spring Boot and MyBatis solution that automatically encrypts and decrypts sensitive database fields via an @Encrypted annotation, eliminating manual cryptographic code, reducing maintenance overhead, and preserving performance while ensuring strong data protection.
Spring Boot 4 launches alongside Spring Framework 7, Spring Data 2025.1 and Spring AI 1.1, introducing Jakarta EE 11, JSpecify null‑safety, build‑time optimizations with Project Leyden, a declarative HTTP client, Jackson 3 support, native API versioning, integrated OpenTelemetry, and a dual‑track AI strategy.
This article explains why traditional string matching and regex struggle with large keyword sets, introduces a DFA‑based solution using a Trie tree for linear‑time detection, provides full Java implementations, shows real‑world integration scenarios, and explores advanced optimizations such as double‑array tries, Aho‑Corasick automata, and sharding with Bloom filters.
