cashier_server/cash-service/system-service/src/main/resources/mapper/VersionMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.czg.service.system.mapper.VersionMapper">

</mapper>