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Resolving PageHelper Integration Issues When integrating pagination using PageHelper in a Spring project, a compatibility issue may arise between different library versions. The error manifests as a NoSuchMethodError related to MyBatis reflection utilities. The root cause typically involves version mismatches between PageHelper and MyBatis. To ...

Provider Side – Service & Data Layer 1.1 Mavan Dependencies <dependencies> <!-- ZooKeeper client --> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>${zk.version}</version> </dependency> &l ...

Introduction to Caching Caching is a common feature in ORM frameworks, designed to enhance query performance and reduce database load by storing frequently accessed data in memory. Cache Architecture In the MyBatis source code, classes related to caching are located in the cache package. The core of this system is the Cache interface, with the ...

This article walks through creating a Java web backend using the SSM stack (Spring, Spring MVC, MyBatis) with Maven, packaging it as a WAR, and deploying it to Tomcat. Common configuration pitfalls are highlighted along the way. 1. Create a WAR‑based Maven project Using your IDE, choose File → New → Maven Project → Create a simple project. Fill ...

Environment Setup JDK version: 17 Build tool: Gradle Spring Boot version: 2.7.18 (Note: Spring Boot 3 introduces significant changes) Spring Security version: 5.7.11 Core Components and Authentication Flow Spring Security implements authentication and authorization through a chain of filters. Each filter has a specific responsibility, and onl ...

System Overview This project outlines the architecture and implementation of a second-hand trading platform designed specifically for campus environments. The system utilizes a WeChat Mini Program for the client interface, ensuring easy access for students without additional installations. The backend is powered by Spring Boot, providing a robu ...

Core Mechanisms of Servlet Request and Response Objects In the Java Servlet ecosystem, the container bridges raw HTTP protocol traffic and business logic through two fundamental abstractions: HttpServletRequest and HttpServletResponse. The former encapsulates incoming client data, while the latter orchestrates the server's reply. Understanding ...

Creating a dish with associated flavor options requires coordinated writes across two database tables: dish and dish_flavor. To preserve data integrity, these operations must execute as a single atomic unit—either all succeed or none do. This is achieved using Spring’s declarative transaction management. The service layer method responsible for ...

Understanding MyBatis Caching Mechanisms MyBatis incorporates an internal caching system designed to enhance application performance by minimizing redundant database interactions. This caching operates at two distinct levels: a local, session-scoped cache and a global, application-scoped cache. First-Level Cache: SqlSession Scope The first-leve ...

MyBatis is a lightweight SQL-mapping framweork that removes most JDBC boiler-plate while still giving full control over SQL. The following walkthrough shows how to integrate it into a Spring Boot project and perform common CRUD operations. Project bootstrap and data source configuration Create a new Spring Boot project with the spring-boot- ...