update

src/main/java/cn/wepact/dfm/training/mapper/SyncUserInfoLogMapper.java

@@ -6,6 +6,7 @@ import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
 
 import java.util.Date;
+import java.util.List;
 @Mapper
 public interface SyncUserInfoLogMapper extends MyBatisBaseMapper<SyncUserInfoLog, Long> {
 
@@ -22,4 +23,6 @@ public interface SyncUserInfoLogMapper extends MyBatisBaseMapper<SyncUserInfoLog
 
     void updateLastSyncTime(Date date);
     SyncUserInfoLog findUserInfoByStuUserId(@Param("stuUserId") String stuUserId);
+
+    List<SyncUserInfoLog> batchFindUserInfoByStuUserIds(@Param("stuUserIds") List<String> stuUserIds);
 }

src/main/java/cn/wepact/dfm/training/mapper/SyncUserInfoLogMapper.xml

@@ -150,4 +150,11 @@
     <select id="findUserInfoByStuUserId" resultMap="UserResultMap">
         SELECT user_id, username FROM sync_user_info_log WHERE user_id = #{stuUserId}
     </select>
+
+    <select id="batchFindUserInfoByStuUserIds" resultMap="UserResultMap">
+        SELECT user_id, username FROM sync_user_info_log WHERE user_id IN
+        <foreach collection="stuUserIds" item="stuUserId" open="(" separator="," close=")">
+            #{stuUserId}
+        </foreach>
+    </select>
 </mapper>

src/main/java/cn/wepact/dfm/training/mapper/TUserMapper.java

@@ -22,4 +22,11 @@ public interface TUserMapper extends MyBatisBaseMapper<TUser, Long> {
      */
 
     Long findUserIdByUsername(@Param("username") String username);
+
+    /**
+     * 批量查询用户ID（替代 N+1 循环查询）
+     * @param usernames 用户名列表
+     * @return username -> userId 映射列表
+     */
+    List<TUser> batchFindUserIdByUsernames(@Param("usernames") List<String> usernames);
 }

src/main/java/cn/wepact/dfm/training/mapper/TUserMapper.xml

@@ -189,5 +189,12 @@
 
   <select id="findUserIdByUsername" resultType="java.lang.Long">
     SELECT id FROM t_user WHERE user_no = #{username}
-    </select>
+  </select>
+
+  <select id="batchFindUserIdByUsernames" resultType="cn.wepact.dfm.training.dto.entity.TUser">
+    SELECT id, user_no AS userNo FROM t_user WHERE user_no IN
+    <foreach collection="usernames" item="username" open="(" separator="," close=")">
+      #{username}
+    </foreach>
+  </select>
 </mapper>