java.lang.IllegalArgumentException: Result Maps collection already contains value for ...
程序员文章站
2022-07-15 13:05:20
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1.场景
启动整合mybatis的springboot项目,报异常如下:
Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [D:\Git\target\classes\mappers\system\SysMenuMapper.xml]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'file [D:\Git\target\classes\mappers\system\SysMenuMapper.xml]'. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.system.mapper.SysMenuMapper.BaseResultMap
2.分析
java.lang.IllegalArgumentException: Result Maps collection already contains value for com.system.mapper.SysMenuMapper.BaseResultMap
在mybatis的xml文件的com.system.mapper.SysMenuMapper.BaseResultMap
早已经存在,检查SysMenuMapper.xml
该文件发现BaseResultMap的id命名重复了
3.解决
找到SysMenuMapper.xml的id重复命名去掉重新启动,解决了
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