caimei-mall-admin/src/main/resources/mapper/NewOrderConfigMapper.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.caimei.modules.order.dao.NewOrderConfigDao">
    <select id="getValueByKey"	resultType="com.caimei.modules.order.entity.NewOrderConfig">
		select c.key AS 'key', c.value AS 'value' from cm_order_config c
		where c.key = #{key}
	</select>
</mapper>