ServiceCompanyFilesMapper.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.subsidy.mapper.ServiceCompanyFilesMapper">

    <select id="companyFiles" resultType="com.subsidy.model.ServiceCompanyFilesDO">
        SELECT
            *
        FROM
            service_company_files t
        WHERE
            t.delete_date IS NULL
            AND t.service_company_id = #{serviceCompanyId}
            <if test="fileName != null and fileName != ''">
                AND t.file_name  like concat('%',#{fileName} ,'%')
            </if>
    </select>

</mapper>