wms-java/build/resources/main/mapper/language/SysLanguageListDao.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.gaotao.modules.language.dao.SysLanguageListDao">


    <select id="searchSysLanguageList" resultType="com.gaotao.modules.language.entity.vo.SysLanguageListVo">
        SELECT
            IsNULL(sol.language_value,sl.language_name) as language_name,
            sl.language_code
        FROM
            sys_language_list sl
                LEFT JOIN sys_object_language_list sol on (sol.language_id = sl.language_id)
        WHERE sol.language_code = #{languageCode}
    </select>
</mapper>