Type interface mapper.UserQueryMapper is already known to the MapperRegistry._type interface com.pa.spring.mapper.usermapper is -优快云博客

本文链接：https://blog.youkuaiyun.com/Wakerex/article/details/103374686

本文详细解析了在使用MyBatis框架时遇到的重复接口注册错误，并提供了具体的解决方案。错误源于同时使用资源方法加载映射文件和批量加载Mapper，导致UserQueryMapper接口重复注册。文章指导如何正确配置，避免此问题。

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十二月 03, 2019 7:04:50 下午 org.springframework.context.support.AbstractApplicationContext refresh
警告: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring/applicationContext.xml]: Invocation of init method failed; nested exception is org.springframework.core.NestedIOException: Failed to parse config resource: class path resource [mybatis/SqlMapConfig.xml]; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.binding.BindingException: Type interface mapper.UserQueryMapper is already known to the MapperRegistry.

我这里引起的原因是：

<mappers>
<!--通过resource方法一次加载一个映射文件-->
        <mapper resource="sqlmap/UserMapper.xml"></mapper>
        <mapper resource="sqlmap/UserQueryMapper.xml"></mapper>
<!--批量加载Mapper-->
        <package name="mapper"/>
    </mappers>

处理方法是：

<mappers>
<!--通过resource方法一次加载一个映射文件-->
        <mapper resource="sqlmap/UserMapper.xml"></mapper>
        <mapper resource="sqlmap/UserQueryMapper.xml"></mapper>
<!--批量加载Mapper-->
        


   否则mappe文件会重复使用相关接口造成错误。