From abbd673ade6d82c06458fe790caacda54e0770c7 Mon Sep 17 00:00:00 2001
From: gulongcheng <474084054@qq.com>
Date: Thu, 26 Feb 2026 16:27:16 +0800
Subject: [PATCH] =?UTF-8?q?fix:=E4=BB=BB=E5=8A=A1=E6=89=A7=E8=A1=8C?=
 =?UTF-8?q?=E6=96=87=E4=BB=B6=E6=90=9C=E7=B4=A2?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../impl/MinioFileIDataFileServiceImpl.java   | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/data/src/main/java/com/sdm/data/service/impl/MinioFileIDataFileServiceImpl.java b/data/src/main/java/com/sdm/data/service/impl/MinioFileIDataFileServiceImpl.java
index 3fba998c..fb6bebeb 100644
--- a/data/src/main/java/com/sdm/data/service/impl/MinioFileIDataFileServiceImpl.java
+++ b/data/src/main/java/com/sdm/data/service/impl/MinioFileIDataFileServiceImpl.java
@@ -2401,14 +2401,29 @@ public class MinioFileIDataFileServiceImpl implements IDataFileService {
         String objectKey = dirMetadataInfo.getObjectKey();
         String prefix = dirTypeEnum.getDirName();
 
+        // 检查是否以指定前缀开头
         if (!objectKey.startsWith(prefix)) {
             return null;
         }
 
-        // knowledge/知识库A/子目录/ 移除前缀knowledge/和最后的/后 ->知识库A/子目录
-        return objectKey.substring(prefix.length()+1, objectKey.length() - 1);
+        // 如果 objectKey 等于 prefix + "/"，说明是根目录，直接返回空字符串
+        if (objectKey.equals(prefix + "/")) {
+            return "";
+        }
+
+        // 截取相对路径部分：移除前缀和末尾的 "/"
+        int beginIndex = prefix.length() + 1; // 起始位置为 prefix 后的第一个字符
+        int endIndex = objectKey.length() - 1; // 结束位置为倒数第二个字符（去掉末尾的 "/"）
+
+        // 确保 beginIndex 不超过 endIndex，避免越界
+        if (beginIndex >= endIndex) {
+            return ""; // 返回空字符串表示没有子路径
+        }
+
+        return objectKey.substring(beginIndex, endIndex);
     }
 
+
     @Override
     public SdmResponse downloadRecord(AddDownloadRecordReq req) {
         return null;