Duplicate Bean

Full-Stack Internet Architecture

Dec 24, 2020 · Backend Development

Resolving Duplicate Mapper Bean Warnings in Spring Boot 2.x with MyBatis‑Plus 3.4.1

This article explains why Spring Boot 2.x combined with MyBatis‑Plus 3.4.1 emits duplicate mapper bean warnings, analyzes the root cause in the MyBatis‑Spring integration, and provides a step‑by‑step fix by aligning dependency versions, especially upgrading the pagehelper‑spring‑boot‑starter to 1.3.0.