解决WARN:Skipping MapperFactoryBean with name ‘xxxBeanMapper‘ and ‘com.xxx.xxxMapper‘ mapperInterface

问题描述

报错信息：Skipping MapperFactoryBean with name ‘xxxMapper’ and ‘xxx.xxx.xxx.mapper.xxxxxMapper’ nterface. Bean already defined with the same name!
若依项目启动时控制台打印出以下WARN 日志，Bean already defined with the same name日志信息大意就是Bean重复注入

 WARN  org.mybatis.spring.mapper.ClassPathMapperScanner - Skipping MapperFactoryBean with name 'archiveBeanMapper' and 'com.cxstar.business.repository.mapper.ArchiveBeanMapper' mapperInterface. Bean already defined with the same name! WARN  org.mybatis.spring.mapper.ClassPathMapperScanner - Skipping MapperFactoryBean with name 'badWordBeanMapper' and 'com.cxstar.business.repository.mapper.BadWordBeanMapper' mapperInterface. Bean already defined with the same name! WARN  org.mybatis.spring.mapper.ClassPathMapperScanner - Skipping MapperFactoryBean with name 'bookMapper' and 'com.cxstar.business.repository.mapper.BookMapper' mapperInterface. Bean already defined with the same name! WARN  org.mybatis.spring.mapper.ClassPathMapperScanner - Skipping MapperFactoryBean with name 'clcViewMapper' and 'com.cxstar.business.repository.mapper.ClcViewMapper' mapperInterface. Bean already defined with the same name! WARN  org.mybatis.spring.mapper.ClassPathMapperScanner - Skipping MapperFactoryBean with name 'ebookCollectionMapper' and 'com.cxstar.business.repository.mapper.EbookCollectionMapper' mapperInterface. Bean already defined with the same name! WARN  org.mybatis.spring.mapper.ClassPathMapperScanner - Skipping MapperFactoryBean with name 'ebookCollectionUnitMapper' and 'com.cxstar.business.repository.mapper.EbookCollectionUnitMapper' mapperInterface. Bean already defined with the same name! WARN  org.mybatis.spring.mapper.ClassPathMapperScanner - Skipping MapperFactoryBean with name 'esPushMapper' and 'com.cxstar.business.repository.mapper.EsPushMapper' mapperInterface. Bean already defined with the same name! 

问题分析

该问题目前还没有发现对项目有影响，但是希望排除掉该问题，因此需要排查问题原因
首先提示Bean重复注入，因此从注入Bean的地方开始排查
当前若依项目使用了自带的mybatis，以及后引入的mybatisplus，先排查这两的配置类的扫描文件是否有路径重复

Mybatis的配置类

/*** 程序注解配置*/
@Configuration
// 表示通过aop框架暴露该代理对象,AopContext能够访问
@EnableAspectJAutoProxy(exposeProxy = true)
// 指定要扫描的Mapper类的包的路径
@MapperScan("com.zqtest.**.mapper")
//@MapperScans({@MapperScan(value = "com.cxstar.system.mapper"),@MapperScan(value = "com.cxstar.quartz.mapper")})
public class ApplicationConfig {//...
}

MybatisPlus的配置类

@EnableTransactionManagement
@Configuration
@MapperScans({@MapperScan(value = "com.zqtest.**.repository.mapper")})
public class MybatisPlusConfig {//...
}

问题就在于Mybatis@MapperScan路径已经包含了MybatisPlus的@MapperScan路径，无论谁先被Spring实例化都会导致最后一个被实例化时报出bean重复注入的警告

问题解决

如果项目中同时使用了Mybatis和MybatisPlus，在各自配置类上应配置详细的要扫描的Mapper类的包的路径，而不是使用‘**’等导致扫描路径重复。