update

mec-biz/src/main/resources/config/mybatis/TeacherMapper.xml

@@ -374,7 +374,7 @@
     </select>
 
     <select id="queryUserNameByIdList" resultType="java.util.Map">
-        select id_ `key`,IF(username_ IS NUll,real_name_,real_name_) `value` FROM sys_user s WHERE id_ IN
+        select id_ `key`,IF(username_ IS NUll,real_name_,username_) `value` FROM sys_user s WHERE id_ IN
         <foreach collection="userIds" item="userId" separator="," open="(" close=")">
             #{userId}
         </foreach>