AdminMapper.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="cn.iocoder.mall.admin.dao.AdminMapper">

    <!--<insert id="insert" parameterType="UserDO" useGeneratedKeys="true" keyProperty="id">-->
        <!--INSERT INTO users (-->
          <!--id, mobile, create_time-->
        <!--) VALUES (-->
          <!--#{id}, #{mobile}, #{createTime}-->
        <!--)-->
    <!--</insert>-->

    <select id="selectByUsername" parameterType="String" resultType="AdminDO">
      SELECT
          id, username, nickname, password, status
      FROM admin
      WHERE username = #{username}
    </select>

</mapper>