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This article introduces Spring Cloud's background, core components (including first‑ and second‑generation modules derived from Netflix OSS), versioning scheme, compatibility with Spring Boot, and practical advice for selecting matching releases to avoid runtime issues in microservice projects.
This article walks through creating a fully automated Spring Boot and MyBatis code generator using Freemarker templates, detailing each step from extracting table metadata to generating DAO, service, controller, and entity classes, and shows how a single-table CRUD can be produced in seconds.
The article explains ACID properties, details how inadequate isolation levels cause dirty reads, non‑repeatable reads, and phantom reads, illustrates each with transaction scenarios and diagrams, and shows how MySQL’s lock types and isolation settings prevent these anomalies, noting the trade‑off between isolation and concurrency.
This guide walks through the need for PDF generation in business scenarios, introduces the iText library (both iText5 and iText7), shows how to add Maven dependencies, provides a minimal “Hello World” PDF example, then details converting HTML (with CSS, images, and Freemarker variables) into PDF, and discusses when custom adaptation is required.
The article explains why logging is essential for problem tracing, status monitoring, and security auditing, introduces Log4j, Log4j2, and Logback components and configuration files, demonstrates usage with Maven dependencies and code snippets, evaluates their synchronous and asynchronous performance, and offers practical recommendations for production environments.
This article explains the fundamentals of SQL injection attacks, demonstrates step‑by‑step exploitation using the DVWA platform—including data extraction, login bypass, and injection point detection—and outlines practical prevention techniques such as input validation, regex filtering, and prepared statements.
This article explains MySQL’s transaction isolation mechanisms, compares the four isolation levels with concrete examples, shows how they affect phenomena like dirty reads, non‑repeatable reads and phantom reads, and provides practical guidance on configuring and avoiding long transactions.
This article explains the fundamentals of transaction handling in Spring Boot, covering both programmatic approaches with PlatformTransactionManager and TransactionTemplate and declarative management using @Transactional, while detailing common pitfalls, propagation and isolation settings, and providing concrete code examples.
This tutorial walks through designing a button‑level user permission system—including a five‑table database schema, Spring Boot + MyBatisPlus project setup, code generation, menu CRUD operations, recursive menu tree construction, role‑based permission queries, and annotation‑driven request authorization—complete with runnable code snippets and sample data.
