Su San, former staff at several leading tech companies, is a top creator on Juejin and a premium creator on CSDN, and runs the free coding practice site www.susan.net.cn.
This article explains the TCC (Try‑Confirm‑Cancel) transaction model, its three practical variants, and provides a step‑by‑step guide with code examples for integrating Seata TCC into a Spring‑Boot e‑commerce order service, while addressing common pitfalls such as idempotency, empty rollbacks, and hanging transactions.
This guide explains how to integrate Spring Boot DevTools into a Spring Boot project to achieve automatic hot deployment and remote debugging, covering Maven dependency setup, IDE configuration, Docker packaging, and step‑by‑step code examples.
This article explains how improper use of NULL in MySQL columns can lead to serious production incidents, outlines official recommendations against NULL, demonstrates its impact on queries, indexes, and storage, and provides practical guidelines for when to use or avoid NULL values.
Spring Boot 4 upgrades its default JSON processor to Jackson 3, introducing new package names, immutable builders, ISO‑8601 date serialization, and removal of checked exceptions, while preserving annotation compatibility for a smooth migration.
This guide compiles the most common Java thread‑pool interview questions, explains why and how thread pools are used, details the core parameters and execution flow of ThreadPoolExecutor, explores internal locks, usage patterns, monitoring, rejection policies, common pitfalls, and introduces the DynamicTp management framework.
This article explains why interviewers probe sharding, walks through the typical chain of questions, compares partition tables and read/write splitting, shows how to decide between sharding strategies, estimate capacity, plan expansion, and safely migrate data with traffic replication.
This article presents a practical guide for SpringBoot projects, detailing twelve concrete strategies—including batch processing, asynchronous execution, caching, pagination, and transaction handling—to dramatically reduce API latency and improve overall backend efficiency.
This article explains why Spring @Transactional may not work as expected, covering issues such as wrong method visibility, final methods, internal calls, missing bean registration, multithreading, unsupported table engines, incorrect propagation settings, swallowed exceptions, and how to resolve each problem.
A real‑world performance disaster caused by N+1 queries in a SpringBoot project was solved by replacing recursive database calls with a single batch query, building an in‑memory hash map, and adding multi‑level caching, achieving a 100× speedup and dramatically reducing system load.
This article compares three popular Java security frameworks—Spring Security, Apache Shiro, and Sa-Token—by examining their architectures, code examples, advantages, drawbacks, and ideal use‑cases, helping developers decide which solution best fits their project's requirements.
