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This article describes a utility method that leverages Java reflection and generics to automatically generate a MyBatis-Plus QueryWrapper from a DTO, handling field‑name mapping, type‑specific query conditions, and camel‑to‑snake case conversion for seamless database queries.
This article explains how MyBatis-Plus's saveOrUpdate method works, why a primary‑key annotation is required, and how to control insert or update operations using UpdateWrapper or QueryWrapper, including code examples, common pitfalls, and practical tips for handling auto‑increment IDs.
The article provides a series of advanced MyBatis-Plus query examples, including table creation, data initialization, and four detailed cases that demonstrate the use of like, nested, in, and limit clauses with QueryWrapper, accompanied by SQL statements, Java test code, and execution screenshots.
This article presents a series of MyBatis-Plus advanced query examples, including how to filter users by name patterns, age ranges, and email presence, and demonstrates ordering and combined conditions with complete Java test code and a sample User table schema.
This article demonstrates how to perform sophisticated MyBatis‑Plus queries—such as date filtering, manager name prefix matching, sub‑queries, INNER JOIN, dynamic SQL with apply, and inSql—while highlighting potential SQL‑injection risks and providing complete Java test code examples.
This tutorial demonstrates several advanced MyBatis-Plus query scenarios—including combined AND conditions, nested expressions, IN clauses, and limiting results—by providing complete SQL setup, Java QueryWrapper code samples, execution logs, and result screenshots for each case.
This tutorial demonstrates how to perform advanced MyBatis-Plus queries—including subqueries, INNER JOIN, apply, and inSql methods—while highlighting difficulty levels, code examples, and the risk of SQL injection in dynamic query construction.