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Insert Operations Retrieving Auto-Generated Primary Keys <insert id="saveCustomer" useGeneratedKeys="true" keyProperty="customerId" parameterType="com.example.domain.Customer"> INSERT INTO customer(name, points, created_at) VALUES (#{name}, #{points}, #{createdAt}) </insert> Batch ...

Implementing data persistence logic requires a clear mapping between Java objects and database tables. The following demonstration outlines the configuration and execution of Create, Read, Update, and Delete (CRUD) operations using MyBatis. Entity Class Definition First, define a Plain Old Java Object (POJO) to represent the data structure. T ...

Introduction to Session Tracking HTTP is a stateless protocol—each request from a client to a server is treated independently. To maintain user context across multiple requests (e.g., keeping a user logged in), web applications use session tracking. A session begins when a user opens a browser and accesses a web application and ends when the ...

A role-based employee attendance management system was implemented using Java Servlets, MyBatis, and MySQL. The system supports login, personal information management, password updates, and attendance tracking with differentiated views for employees, department managers, and administrators. The data model consists of two primary entities: Staf ...

Building upon foundational MyBatis knowledge, this guide demonstrates how to implement Create, Read, Update, and Delete (CRUD) operations using MyBatis with a clean and maintainable structure. The implementation requires updates to three core components: the DAO enterface, its corresponding XML mapper, and test cases. All CRUD methods are conso ...

Database Setup and Configuration This guide demonstrtaes how to implement basic CRUD operations using MyBatis. We'll use a student management system as our example. Database Initialization CREATE DATABASE `test` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci; CREATE TABLE `student` ( `id` INT NOT NULL AUTO_INCREMENT, `name` VARCHAR ...

During a Java-based system refactoring project—intended to replace an aging PHP application while reusing its existing MySQL database—developers observed inconsistent transaction behavior. Despite correctly applying @Transactional on service methods and deliberately triggering unchecked exceptions (e.g., int result = 1 / 0;), database changes p ...

Detailed Video Demonstration Contact the author for access to more detailed demonstration videos. Specific Implementation Screenshots Included in the documentation. Technology Stack Backend Framework: SpringBoot Spring Boot, built on the Spring Framework, offers several advantages. It includes embedded servers like Tomcat, Jetty, and Undertow, ...

Dynamic SQL for Date Range and List Queries When building dynamic queries in MyBatis, it's common to filter by date ranges and iterate over a list of values. Below is an example showing how to handle both scenarios using MyBatis dynamic SQL with where, if, and foreach tags. SQL Mapping <select id="selectQuotaManagement" resultType= ...

Forward Engineering First, create Java entity classes, then the framework generates database tables based on them. Hibernate supports forward engineering. Reverse Engineering First, create the database tables, then the framework generates the folloiwng resources from them: Java entity clases Mapper interfaces Mapper XML mapping files Steps to ...