AdministerMapper.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.meishu.mapper.AdministerMapper">

    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="com.meishu.model.AdministerDO">
        <id column="id" property="id" />
        <result column="user_name" property="userName" />
    </resultMap>

    <!-- 通用查询结果列 -->
    <sql id="Base_Column_List">
        create_date,
        update_date,
        create_date,
        id, telephone, user_name, img, role
    </sql>

    <select id="administers" parameterType="string" resultType="com.meishu.model.AdministerDO">
        SELECT
            *
        FROM
            administer t
        WHERE
            t.delete_date is null
            <if test="userName != null and userName != ''">
                and  t.user_name LIKE  concat('%',#{userName} ,'%')
                OR t.account_name LIKE  concat('%',#{userName} ,'%')
            </if>
    </select>

</mapper>