将逆向生成的文件粘贴到项目中，出现以下报错

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问题描述：

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: com.mysql.jdbc.Driver

甘炽文 2023-08-12

源自：架构初知与单体架构设计 2-19 附：使用MyBatis数据库逆向生成工具

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风间影月回答被采纳获得+3积分 2023-08-12 14:53:09

参考一下逆向工具里的数据源，你的数据库不匹配就是要改的，其实控制台里的报错也很明显，直接复制粘贴换一下就行。

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甘炽文提问者 #1

老师还是不行，会报配置文件错误
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [tk/mybatis/mapper/autoconfigure/MapperAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [/Users/我的文件/软件开发/foodie-dev/foodie-dev-mapper/target/classes/mapper/UsersMapper.xml]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file [/Users/我的文件/软件开发/foodie-dev/foodie-dev-mapper/target/classes/mapper/UsersMapper.xml]'. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.imooc.mapper.UsersMapper.BaseResultMap

2023-08-12 15:35:01
风间影月回复提问者甘炽文 #2

你的mapper文件打开看看，是不是有重复的，这玩意不能重复生成，其实很多错误看日志是可以获得错误的原因的

2023-08-12 17:19:36
甘炽文提问者回复风间影月 #3

没有重复文件生成，都是单一的

2023-08-13 10:36:35