ks/target/classes/mapper/CouponUserMapper.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.zt.mapper.CouponUserMapper">

    <resultMap id="BaseResultMap" type="com.zt.pojo.CouponUser">
            <id property="id" column="id" jdbcType="BIGINT"/>
            <result property="userId" column="user_id" jdbcType="BIGINT"/>
            <result property="couponId" column="coupon_id" jdbcType="BIGINT"/>
    </resultMap>

    <sql id="Base_Column_List">
        id,user_id,coupon_id
    </sql>
</mapper>