解决Type interface com.kuang.mapper.UserMapper is not known to the MapperRegistry.的问题

错误代码：

二月 13, 2022 7:43:04 下午 org.springframework.jdbc.datasource.DriverManagerDataSource setDriverClassName
信息: Loaded JDBC driver: com.mysql.cj.jdbc.Driver
二月 13, 2022 7:43:05 下午 org.apache.ibatis.logging.commons.JakartaCommonsLoggingImpl warn
警告: Property 'mapperLocations' was specified but matching resources are not found.
Exception in thread "main" org.apache.ibatis.binding.BindingException: Type interface com.kuang.mapper.UserMapper is not known to the MapperRegistry.at org.apache.ibatis.binding.MapperRegistry.getMapper(MapperRegistry.java:47)at org.apache.ibatis.session.Configuration.getMapper(Configuration.java:779)at org.mybatis.spring.SqlSessionTemplate.getMapper(SqlSessionTemplate.java:311)at com.kuang.mapper.UserMapperImpl.selectUser(UserMapperImpl.java:19)at MyTest.main(MyTest.java:10)

经过检查发现，target中未生成 UserMapper.xml文件。

暂时的解决办法是把以前文件中的 target -->classes-->com-->kuang-->mapper中的UserMapper.xml文件复制下来，粘贴到现在那个文件的target同样位置中，非常的治标不治本。

或者重新创建一个项目，编写同样的代码。感觉可能是创建项目的时候idea出错的问题。

暂未找到解决方法

看了四个小时属实是心态崩了，记录下来等level更高之后再尝试解决。

路径：spring-study --> spring-12-transaction

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