xm/src/main/resources/mapper/CoursesMapper.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.zhentao.mapper.CoursesMapper">

    <resultMap id="BaseResultMap" type="com.zhentao.pojo.Courses">
            <id property="courseId" column="course_id" jdbcType="BIGINT"/>
            <result property="courseName" column="course_name" jdbcType="VARCHAR"/>
            <result property="teacherId" column="teacher_id" jdbcType="BIGINT"/>
            <result property="description" column="description" jdbcType="VARCHAR"/>
            <result property="publishStatus" column="publish_status" jdbcType="TINYINT"/>
            <result property="shortLink" column="short_link" jdbcType="VARCHAR"/>
            <result property="createdAt" column="created_at" jdbcType="TIMESTAMP"/>
            <result property="updatedAt" column="updated_at" jdbcType="TIMESTAMP"/>
            <result property="shopId" column="shop_id" jdbcType="BIGINT"/>
            <result property="salesMethod" column="sales_method" jdbcType="TINYINT"/>
            <result property="price" column="price" jdbcType="DECIMAL"/>
            <result property="password" column="password" jdbcType="VARCHAR"/>
            <result property="title" column="title" jdbcType="VARCHAR"/>
    </resultMap>

    <sql id="Base_Column_List">
        course_id,course_name,teacher_id,
        description,publish_status,short_link,
        created_at,updated_at,shop_id,
        sales_method,price,password,
        title
    </sql>
</mapper>