feat(knowledge): 添加知识库目录管理功能

- 在知识条目表中新增relative_path字段用于存储条目相对路径
- 创建知识条目目录表用于管理知识库中的目录结构
- 实现目录的增删查接口和相应的应用服务逻辑
- 在前端知识库详情页面集成目录显示和操作功能
- 添加目录创建删除等相关的API接口和DTO定义
- 更新数据库初始化脚本包含新的目录表结构

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/application/KnowledgeDirectoryApplicationService.java

@@ -0,0 +1,142 @@
+package com.datamate.datamanagement.application;
+
+import com.datamate.common.infrastructure.exception.BusinessAssert;
+import com.datamate.common.infrastructure.exception.CommonErrorCode;
+import com.datamate.datamanagement.common.enums.KnowledgeStatusType;
+import com.datamate.datamanagement.domain.model.knowledge.KnowledgeItemDirectory;
+import com.datamate.datamanagement.domain.model.knowledge.KnowledgeSet;
+import com.datamate.datamanagement.infrastructure.exception.DataManagementErrorCode;
+import com.datamate.datamanagement.infrastructure.persistence.repository.KnowledgeItemDirectoryRepository;
+import com.datamate.datamanagement.infrastructure.persistence.repository.KnowledgeItemRepository;
+import com.datamate.datamanagement.infrastructure.persistence.repository.KnowledgeSetRepository;
+import com.datamate.datamanagement.interfaces.dto.CreateKnowledgeDirectoryRequest;
+import com.datamate.datamanagement.interfaces.dto.KnowledgeDirectoryQuery;
+import lombok.RequiredArgsConstructor;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.UUID;
+
+/**
+ * 知识条目目录应用服务
+ */
+@Service
+@Transactional
+@RequiredArgsConstructor
+public class KnowledgeDirectoryApplicationService {
+    private static final String PATH_SEPARATOR = "/";
+    private static final String INVALID_PATH_SEGMENT = "..";
+
+    private final KnowledgeItemDirectoryRepository knowledgeItemDirectoryRepository;
+    private final KnowledgeItemRepository knowledgeItemRepository;
+    private final KnowledgeSetRepository knowledgeSetRepository;
+
+    @Transactional(readOnly = true)
+    public List<KnowledgeItemDirectory> getKnowledgeDirectories(String setId, KnowledgeDirectoryQuery query) {
+        BusinessAssert.notNull(query, CommonErrorCode.PARAM_ERROR);
+        query.setSetId(setId);
+        return knowledgeItemDirectoryRepository.findByCriteria(query);
+    }
+
+    public KnowledgeItemDirectory createKnowledgeDirectory(String setId, CreateKnowledgeDirectoryRequest request) {
+        BusinessAssert.notNull(request, CommonErrorCode.PARAM_ERROR);
+        KnowledgeSet knowledgeSet = requireKnowledgeSet(setId);
+        BusinessAssert.isTrue(!isReadOnlyStatus(knowledgeSet.getStatus()),
+            DataManagementErrorCode.KNOWLEDGE_SET_STATUS_ERROR);
+
+        String directoryName = normalizeDirectoryName(request.getDirectoryName());
+        validateDirectoryName(directoryName);
+
+        String parentPrefix = normalizeRelativePathPrefix(request.getParentPrefix());
+        String relativePath = normalizeRelativePathValue(parentPrefix + directoryName);
+        validateRelativePath(relativePath);
+
+        BusinessAssert.isTrue(!knowledgeItemRepository.existsBySetIdAndRelativePath(setId, relativePath),
+            CommonErrorCode.PARAM_ERROR);
+
+        KnowledgeItemDirectory existing = knowledgeItemDirectoryRepository.findBySetIdAndPath(setId, relativePath);
+        if (existing != null) {
+            return existing;
+        }
+
+        KnowledgeItemDirectory directory = new KnowledgeItemDirectory();
+        directory.setId(UUID.randomUUID().toString());
+        directory.setSetId(setId);
+        directory.setName(directoryName);
+        directory.setRelativePath(relativePath);
+        knowledgeItemDirectoryRepository.save(directory);
+        return directory;
+    }
+
+    public void deleteKnowledgeDirectory(String setId, String relativePath) {
+        KnowledgeSet knowledgeSet = requireKnowledgeSet(setId);
+        BusinessAssert.isTrue(!isReadOnlyStatus(knowledgeSet.getStatus()),
+            DataManagementErrorCode.KNOWLEDGE_SET_STATUS_ERROR);
+
+        String normalized = normalizeRelativePathValue(relativePath);
+        validateRelativePath(normalized);
+
+        knowledgeItemRepository.removeByRelativePathPrefix(setId, normalized);
+        knowledgeItemDirectoryRepository.removeByRelativePathPrefix(setId, normalized);
+    }
+
+    private KnowledgeSet requireKnowledgeSet(String setId) {
+        KnowledgeSet knowledgeSet = knowledgeSetRepository.getById(setId);
+        BusinessAssert.notNull(knowledgeSet, DataManagementErrorCode.KNOWLEDGE_SET_NOT_FOUND);
+        return knowledgeSet;
+    }
+
+    private boolean isReadOnlyStatus(KnowledgeStatusType status) {
+        return status == KnowledgeStatusType.ARCHIVED || status == KnowledgeStatusType.DEPRECATED;
+    }
+
+    private String normalizeDirectoryName(String name) {
+        return StringUtils.trimToEmpty(name);
+    }
+
+    private void validateDirectoryName(String name) {
+        BusinessAssert.isTrue(StringUtils.isNotBlank(name), CommonErrorCode.PARAM_ERROR);
+        BusinessAssert.isTrue(!name.contains(PATH_SEPARATOR), CommonErrorCode.PARAM_ERROR);
+        BusinessAssert.isTrue(!name.contains("\\"), CommonErrorCode.PARAM_ERROR);
+        BusinessAssert.isTrue(!name.contains(INVALID_PATH_SEGMENT), CommonErrorCode.PARAM_ERROR);
+    }
+
+    private void validateRelativePath(String relativePath) {
+        BusinessAssert.isTrue(StringUtils.isNotBlank(relativePath), CommonErrorCode.PARAM_ERROR);
+        BusinessAssert.isTrue(!relativePath.contains(INVALID_PATH_SEGMENT), CommonErrorCode.PARAM_ERROR);
+    }
+
+    private String normalizeRelativePathPrefix(String prefix) {
+        if (StringUtils.isBlank(prefix)) {
+            return "";
+        }
+        String normalized = prefix.replace("\\", PATH_SEPARATOR).trim();
+        while (normalized.startsWith(PATH_SEPARATOR)) {
+            normalized = normalized.substring(1);
+        }
+        while (normalized.endsWith(PATH_SEPARATOR)) {
+            normalized = normalized.substring(0, normalized.length() - 1);
+        }
+        if (StringUtils.isBlank(normalized)) {
+            return "";
+        }
+        validateRelativePath(normalized);
+        return normalized + PATH_SEPARATOR;
+    }
+
+    private String normalizeRelativePathValue(String relativePath) {
+        if (StringUtils.isBlank(relativePath)) {
+            return "";
+        }
+        String normalized = relativePath.replace("\\", PATH_SEPARATOR).trim();
+        while (normalized.startsWith(PATH_SEPARATOR)) {
+            normalized = normalized.substring(1);
+        }
+        while (normalized.endsWith(PATH_SEPARATOR)) {
+            normalized = normalized.substring(0, normalized.length() - 1);
+        }
+        return normalized;
+    }
+}

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/domain/model/knowledge/KnowledgeItemDirectory.java

@@ -0,0 +1,29 @@
+package com.datamate.datamanagement.domain.model.knowledge;
+
+import com.baomidou.mybatisplus.annotation.TableName;
+import com.datamate.common.domain.model.base.BaseEntity;
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * 知识条目目录实体（与数据库表 t_dm_knowledge_item_directories 对齐）
+ */
+@Getter
+@Setter
+@TableName(value = "t_dm_knowledge_item_directories", autoResultMap = true)
+public class KnowledgeItemDirectory extends BaseEntity<String> {
+    /**
+     * 所属知识集ID
+     */
+    private String setId;
+
+    /**
+     * 目录名称
+     */
+    private String name;
+
+    /**
+     * 目录相对路径
+     */
+    private String relativePath;
+}

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/persistence/mapper/KnowledgeItemDirectoryMapper.java

@@ -0,0 +1,9 @@
+package com.datamate.datamanagement.infrastructure.persistence.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.datamate.datamanagement.domain.model.knowledge.KnowledgeItemDirectory;
+import org.apache.ibatis.annotations.Mapper;
+
+@Mapper
+public interface KnowledgeItemDirectoryMapper extends BaseMapper<KnowledgeItemDirectory> {
+}

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/persistence/repository/KnowledgeItemDirectoryRepository.java

@@ -0,0 +1,18 @@
+package com.datamate.datamanagement.infrastructure.persistence.repository;
+
+import com.baomidou.mybatisplus.extension.repository.IRepository;
+import com.datamate.datamanagement.domain.model.knowledge.KnowledgeItemDirectory;
+import com.datamate.datamanagement.interfaces.dto.KnowledgeDirectoryQuery;
+
+import java.util.List;
+
+/**
+ * 知识条目目录仓储接口
+ */
+public interface KnowledgeItemDirectoryRepository extends IRepository<KnowledgeItemDirectory> {
+    List<KnowledgeItemDirectory> findByCriteria(KnowledgeDirectoryQuery query);
+
+    KnowledgeItemDirectory findBySetIdAndPath(String setId, String relativePath);
+
+    int removeByRelativePathPrefix(String setId, String relativePath);
+}

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/persistence/repository/KnowledgeItemRepository.java

@@ -26,4 +26,8 @@ public interface KnowledgeItemRepository extends IRepository<KnowledgeItem> {
     IPage<KnowledgeItemSearchResponse> searchFileItems(IPage<?> page, String keyword);
 
     Long sumDatasetFileSize();
+
+    boolean existsBySetIdAndRelativePath(String setId, String relativePath);
+
+    int removeByRelativePathPrefix(String setId, String relativePath);
 }

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/persistence/repository/impl/KnowledgeItemDirectoryRepositoryImpl.java

@@ -0,0 +1,96 @@
+package com.datamate.datamanagement.infrastructure.persistence.repository.impl;
+
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.baomidou.mybatisplus.extension.repository.CrudRepository;
+import com.datamate.datamanagement.domain.model.knowledge.KnowledgeItemDirectory;
+import com.datamate.datamanagement.infrastructure.persistence.mapper.KnowledgeItemDirectoryMapper;
+import com.datamate.datamanagement.infrastructure.persistence.repository.KnowledgeItemDirectoryRepository;
+import com.datamate.datamanagement.interfaces.dto.KnowledgeDirectoryQuery;
+import lombok.RequiredArgsConstructor;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+/**
+ * 知识条目目录仓储实现类
+ */
+@Repository
+@RequiredArgsConstructor
+public class KnowledgeItemDirectoryRepositoryImpl
+    extends CrudRepository<KnowledgeItemDirectoryMapper, KnowledgeItemDirectory>
+    implements KnowledgeItemDirectoryRepository {
+
+    private static final String PATH_SEPARATOR = "/";
+    private final KnowledgeItemDirectoryMapper knowledgeItemDirectoryMapper;
+
+    @Override
+    public List<KnowledgeItemDirectory> findByCriteria(KnowledgeDirectoryQuery query) {
+        String relativePath = normalizeRelativePathPrefix(query.getRelativePath());
+        LambdaQueryWrapper<KnowledgeItemDirectory> wrapper = new LambdaQueryWrapper<KnowledgeItemDirectory>()
+            .eq(StringUtils.isNotBlank(query.getSetId()), KnowledgeItemDirectory::getSetId, query.getSetId())
+            .likeRight(StringUtils.isNotBlank(relativePath), KnowledgeItemDirectory::getRelativePath, relativePath);
+
+        if (StringUtils.isNotBlank(query.getKeyword())) {
+            wrapper.and(w -> w.like(KnowledgeItemDirectory::getName, query.getKeyword())
+                .or()
+                .like(KnowledgeItemDirectory::getRelativePath, query.getKeyword()));
+        }
+
+        wrapper.orderByAsc(KnowledgeItemDirectory::getRelativePath);
+        return knowledgeItemDirectoryMapper.selectList(wrapper);
+    }
+
+    @Override
+    public KnowledgeItemDirectory findBySetIdAndPath(String setId, String relativePath) {
+        return knowledgeItemDirectoryMapper.selectOne(new LambdaQueryWrapper<KnowledgeItemDirectory>()
+            .eq(KnowledgeItemDirectory::getSetId, setId)
+            .eq(KnowledgeItemDirectory::getRelativePath, relativePath));
+    }
+
+    @Override
+    public int removeByRelativePathPrefix(String setId, String relativePath) {
+        String normalized = normalizeRelativePathValue(relativePath);
+        if (StringUtils.isBlank(normalized)) {
+            return 0;
+        }
+        String prefix = normalizeRelativePathPrefix(normalized);
+        LambdaQueryWrapper<KnowledgeItemDirectory> wrapper = new LambdaQueryWrapper<KnowledgeItemDirectory>()
+            .eq(KnowledgeItemDirectory::getSetId, setId)
+            .and(w -> w.eq(KnowledgeItemDirectory::getRelativePath, normalized)
+                .or()
+                .likeRight(KnowledgeItemDirectory::getRelativePath, prefix));
+        return knowledgeItemDirectoryMapper.delete(wrapper);
+    }
+
+    private String normalizeRelativePathPrefix(String relativePath) {
+        if (StringUtils.isBlank(relativePath)) {
+            return "";
+        }
+        String normalized = relativePath.replace("\\", PATH_SEPARATOR).trim();
+        while (normalized.startsWith(PATH_SEPARATOR)) {
+            normalized = normalized.substring(1);
+        }
+        if (StringUtils.isBlank(normalized)) {
+            return "";
+        }
+        if (!normalized.endsWith(PATH_SEPARATOR)) {
+            normalized = normalized + PATH_SEPARATOR;
+        }
+        return normalized;
+    }
+
+    private String normalizeRelativePathValue(String relativePath) {
+        if (StringUtils.isBlank(relativePath)) {
+            return "";
+        }
+        String normalized = relativePath.replace("\\", PATH_SEPARATOR).trim();
+        while (normalized.startsWith(PATH_SEPARATOR)) {
+            normalized = normalized.substring(1);
+        }
+        while (normalized.endsWith(PATH_SEPARATOR)) {
+            normalized = normalized.substring(0, normalized.length() - 1);
+        }
+        return normalized;
+    }
+}

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/infrastructure/persistence/repository/impl/KnowledgeItemRepositoryImpl.java

@@ -83,6 +83,31 @@ public class KnowledgeItemRepositoryImpl extends CrudRepository<KnowledgeItemMap
         return knowledgeItemMapper.sumDatasetFileSize();
     }
 
+    @Override
+    public boolean existsBySetIdAndRelativePath(String setId, String relativePath) {
+        if (StringUtils.isBlank(setId) || StringUtils.isBlank(relativePath)) {
+            return false;
+        }
+        return knowledgeItemMapper.selectCount(new LambdaQueryWrapper<KnowledgeItem>()
+            .eq(KnowledgeItem::getSetId, setId)
+            .eq(KnowledgeItem::getRelativePath, relativePath)) > 0;
+    }
+
+    @Override
+    public int removeByRelativePathPrefix(String setId, String relativePath) {
+        String normalized = normalizeRelativePathValue(relativePath);
+        if (StringUtils.isBlank(setId) || StringUtils.isBlank(normalized)) {
+            return 0;
+        }
+        String prefix = normalizeRelativePathPrefix(normalized);
+        LambdaQueryWrapper<KnowledgeItem> wrapper = new LambdaQueryWrapper<KnowledgeItem>()
+            .eq(KnowledgeItem::getSetId, setId)
+            .and(w -> w.eq(KnowledgeItem::getRelativePath, normalized)
+                .or()
+                .likeRight(KnowledgeItem::getRelativePath, prefix));
+        return knowledgeItemMapper.delete(wrapper);
+    }
+
     private String normalizeRelativePathPrefix(String relativePath) {
         if (StringUtils.isBlank(relativePath)) {
             return "";
@@ -99,4 +124,18 @@ public class KnowledgeItemRepositoryImpl extends CrudRepository<KnowledgeItemMap
         }
         return normalized;
     }
+
+    private String normalizeRelativePathValue(String relativePath) {
+        if (StringUtils.isBlank(relativePath)) {
+            return "";
+        }
+        String normalized = relativePath.replace("\\", PATH_SEPARATOR).trim();
+        while (normalized.startsWith(PATH_SEPARATOR)) {
+            normalized = normalized.substring(1);
+        }
+        while (normalized.endsWith(PATH_SEPARATOR)) {
+            normalized = normalized.substring(0, normalized.length() - 1);
+        }
+        return normalized;
+    }
 }

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/interfaces/converter/KnowledgeConverter.java

@@ -1,9 +1,11 @@
 package com.datamate.datamanagement.interfaces.converter;
 
 import com.datamate.datamanagement.domain.model.knowledge.KnowledgeItem;
+import com.datamate.datamanagement.domain.model.knowledge.KnowledgeItemDirectory;
 import com.datamate.datamanagement.domain.model.knowledge.KnowledgeSet;
 import com.datamate.datamanagement.interfaces.dto.CreateKnowledgeItemRequest;
 import com.datamate.datamanagement.interfaces.dto.CreateKnowledgeSetRequest;
+import com.datamate.datamanagement.interfaces.dto.KnowledgeDirectoryResponse;
 import com.datamate.datamanagement.interfaces.dto.KnowledgeItemResponse;
 import com.datamate.datamanagement.interfaces.dto.KnowledgeSetResponse;
 import org.mapstruct.Mapper;
@@ -31,4 +33,8 @@ public interface KnowledgeConverter {
     KnowledgeItemResponse convertToResponse(KnowledgeItem knowledgeItem);
 
     List<KnowledgeItemResponse> convertItemResponses(List<KnowledgeItem> items);
+
+    KnowledgeDirectoryResponse convertToResponse(KnowledgeItemDirectory directory);
+
+    List<KnowledgeDirectoryResponse> convertDirectoryResponses(List<KnowledgeItemDirectory> directories);
 }

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/interfaces/dto/CreateKnowledgeDirectoryRequest.java

@@ -0,0 +1,20 @@
+package com.datamate.datamanagement.interfaces.dto;
+
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * 创建知识条目目录请求
+ */
+@Getter
+@Setter
+public class CreateKnowledgeDirectoryRequest {
+
+    /** 父级前缀路径，例如 "docs/"，为空表示知识集根目录 */
+    private String parentPrefix;
+
+    /** 新建目录名称 */
+    @NotBlank
+    private String directoryName;
+}

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/interfaces/dto/KnowledgeDirectoryQuery.java

@@ -0,0 +1,20 @@
+package com.datamate.datamanagement.interfaces.dto;
+
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * 知识条目目录查询参数
+ */
+@Getter
+@Setter
+public class KnowledgeDirectoryQuery {
+    /** 所属知识集ID */
+    private String setId;
+
+    /** 目录相对路径前缀 */
+    private String relativePath;
+
+    /** 搜索关键字 */
+    private String keyword;
+}

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/interfaces/dto/KnowledgeDirectoryResponse.java

@@ -0,0 +1,20 @@
+package com.datamate.datamanagement.interfaces.dto;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.LocalDateTime;
+
+/**
+ * 知识条目目录响应
+ */
+@Getter
+@Setter
+public class KnowledgeDirectoryResponse {
+    private String id;
+    private String setId;
+    private String name;
+    private String relativePath;
+    private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
+}

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/interfaces/rest/KnowledgeDirectoryController.java

@@ -0,0 +1,43 @@
+package com.datamate.datamanagement.interfaces.rest;
+
+import com.datamate.datamanagement.application.KnowledgeDirectoryApplicationService;
+import com.datamate.datamanagement.domain.model.knowledge.KnowledgeItemDirectory;
+import com.datamate.datamanagement.interfaces.converter.KnowledgeConverter;
+import com.datamate.datamanagement.interfaces.dto.CreateKnowledgeDirectoryRequest;
+import com.datamate.datamanagement.interfaces.dto.KnowledgeDirectoryQuery;
+import com.datamate.datamanagement.interfaces.dto.KnowledgeDirectoryResponse;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+/**
+ * 知识条目目录 REST 控制器
+ */
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/data-management/knowledge-sets/{setId}/directories")
+public class KnowledgeDirectoryController {
+    private final KnowledgeDirectoryApplicationService knowledgeDirectoryApplicationService;
+
+    @GetMapping
+    public List<KnowledgeDirectoryResponse> getKnowledgeDirectories(@PathVariable("setId") String setId,
+                                                                   KnowledgeDirectoryQuery query) {
+        List<KnowledgeItemDirectory> directories = knowledgeDirectoryApplicationService.getKnowledgeDirectories(setId, query);
+        return KnowledgeConverter.INSTANCE.convertDirectoryResponses(directories);
+    }
+
+    @PostMapping
+    public KnowledgeDirectoryResponse createKnowledgeDirectory(@PathVariable("setId") String setId,
+                                                              @RequestBody @Valid CreateKnowledgeDirectoryRequest request) {
+        KnowledgeItemDirectory directory = knowledgeDirectoryApplicationService.createKnowledgeDirectory(setId, request);
+        return KnowledgeConverter.INSTANCE.convertToResponse(directory);
+    }
+
+    @DeleteMapping
+    public void deleteKnowledgeDirectory(@PathVariable("setId") String setId,
+                                         @RequestParam("relativePath") String relativePath) {
+        knowledgeDirectoryApplicationService.deleteKnowledgeDirectory(setId, relativePath);
+    }
+}

frontend/src/pages/KnowledgeManagement/Detail/KnowledgeSetDetail.tsx

@@ -16,11 +16,13 @@ import { useNavigate, useParams } from "react-router";
 import DetailHeader from "@/components/DetailHeader";
 import { SearchControls } from "@/components/SearchControls";
 import {
+  createKnowledgeDirectoryUsingPost,
+  deleteKnowledgeDirectoryUsingDelete,
   deleteKnowledgeItemByIdUsingDelete,
-  deleteKnowledgeItemsByIdsUsingPost,
   deleteKnowledgeSetByIdUsingDelete,
   downloadKnowledgeItemFileUsingGet,
   exportKnowledgeItemsUsingGet,
+  queryKnowledgeDirectoriesUsingGet,
   queryKnowledgeItemsUsingGet,
   queryKnowledgeSetByIdUsingGet,
 } from "../knowledge-management.api";
@@ -33,6 +35,7 @@ import {
 } from "../knowledge-management.const";
 import {
   KnowledgeItem,
+  KnowledgeDirectory,
   KnowledgeSet,
   KnowledgeContentType,
   KnowledgeSourceType,
@@ -108,6 +111,8 @@ const KnowledgeSetDetail = () => {
   const [fileKeyword, setFileKeyword] = useState("");
   const [itemsLoading, setItemsLoading] = useState(false);
   const [allItems, setAllItems] = useState<KnowledgeItemView[]>([]);
+  const [directoriesLoading, setDirectoriesLoading] = useState(false);
+  const [allDirectories, setAllDirectories] = useState<KnowledgeDirectory[]>([]);
   const [filePagination, setFilePagination] = useState({
     current: 1,
     pageSize: 10,
@@ -157,6 +162,29 @@ const KnowledgeSetDetail = () => {
     }
   }, [fileKeyword, filePrefix, id, message]);
 
+  const fetchDirectories = useCallback(async () => {
+    if (!id) {
+      setAllDirectories([]);
+      return;
+    }
+    setDirectoriesLoading(true);
+    try {
+      const currentPrefix = normalizePrefix(filePrefix);
+      const keyword = fileKeyword.trim();
+      const { data } = await queryKnowledgeDirectoriesUsingGet(id, {
+        ...(currentPrefix ? { relativePath: currentPrefix } : {}),
+        ...(keyword ? { keyword } : {}),
+      });
+      const directories = Array.isArray(data) ? data : [];
+      setAllDirectories(directories);
+    } catch (error) {
+      console.error("加载知识目录失败", error);
+      message.error("知识目录加载失败");
+    } finally {
+      setDirectoriesLoading(false);
+    }
+  }, [fileKeyword, filePrefix, id, message]);
+
   useEffect(() => {
     fetchKnowledgeSet();
   }, [fetchKnowledgeSet]);
@@ -164,8 +192,9 @@ const KnowledgeSetDetail = () => {
   useEffect(() => {
     if (id) {
       fetchItems();
+      fetchDirectories();
     }
-  }, [id, fetchItems]);
+  }, [id, fetchItems, fetchDirectories]);
 
   useEffect(() => {
     setFilePagination((prev) => ({ ...prev, current: 1 }));
@@ -213,6 +242,11 @@ const KnowledgeSetDetail = () => {
     return normalizePath(rawPath).replace(/^\/+/, "");
   }, []);
 
+  const resolveDirectoryRelativePath = useCallback((directory: KnowledgeDirectory) => {
+    const rawPath = directory.relativePath || "";
+    return normalizePath(rawPath).replace(/^\/+/, "");
+  }, []);
+
   const resolveDisplayName = useCallback(
     (record: KnowledgeItemView) => {
       const relativePath = resolveItemRelativePath(record);
@@ -395,21 +429,12 @@ const KnowledgeSetDetail = () => {
       return;
     }
     const currentPrefix = normalizePrefix(filePrefix);
-    const directoryPrefix = normalizePrefix(`${currentPrefix}${directoryName}`);
+    const directoryPath = normalizePrefix(`${currentPrefix}${directoryName}`).replace(/\/$/, "");
-    const targetIds = allItems
-      .filter((item) => {
-        const fullPath = resolveItemRelativePath(item);
-        return fullPath.startsWith(directoryPrefix);
-      })
-      .map((item) => item.id);
-    if (targetIds.length === 0) {
-      message.info("该文件夹为空");
-      return;
-    }
     try {
-      await deleteKnowledgeItemsByIdsUsingPost(id, { ids: targetIds });
+      await deleteKnowledgeDirectoryUsingDelete(id, directoryPath);
-      message.success(`已删除 ${targetIds.length} 个条目`);
+      message.success("文件夹已删除");
       fetchItems();
+      fetchDirectories();
     } catch (error) {
       console.error("删除文件夹失败", error);
       message.error("文件夹删除失败");
@@ -458,6 +483,21 @@ const KnowledgeSetDetail = () => {
       });
     });
 
+    allDirectories.forEach((directory) => {
+      const fullPath = resolveDirectoryRelativePath(directory);
+      if (!fullPath) {
+        return;
+      }
+      const segments = splitRelativePath(fullPath, normalizedPrefix);
+      if (segments.length === 0) {
+        return;
+      }
+      const leafName = segments[0];
+      if (!folderMap.has(leafName)) {
+        folderMap.set(leafName, { name: leafName, fileCount: 0 });
+      }
+    });
+
     const folderItems: KnowledgeItemRow[] = Array.from(folderMap.values()).map((entry) => ({
       id: `directory-${normalizedPrefix}${entry.name}`,
       setId: id || "",
@@ -486,7 +526,15 @@ const KnowledgeSetDetail = () => {
 
     const combined = [...folderItems, ...fileItems];
     return { rows: combined, total: combined.length };
-  }, [allItems, id, normalizedPrefix, resolveDisplayName, resolveItemRelativePath]);
+  }, [
+    allDirectories,
+    allItems,
+    id,
+    normalizedPrefix,
+    resolveDisplayName,
+    resolveDirectoryRelativePath,
+    resolveItemRelativePath,
+  ]);
 
   const pageCurrent = filePagination.current;
   const pageSize = filePagination.pageSize;
@@ -786,9 +834,23 @@ const KnowledgeSetDetail = () => {
                       message.warning("请输入合法的文件夹名称");
                       return Promise.reject();
                     }
+                    if (!id) {
+                      return Promise.reject();
+                    }
                     const currentPrefix = normalizePrefix(filePrefix);
-                    const nextPrefix = normalizePrefix(`${currentPrefix}${dirName}`);
+                    try {
-                    setFilePrefix(nextPrefix);
+                      await createKnowledgeDirectoryUsingPost(id, {
+                        parentPrefix: currentPrefix,
+                        directoryName: dirName,
+                      });
+                      message.success("文件夹已创建");
+                      const nextPrefix = normalizePrefix(`${currentPrefix}${dirName}`);
+                      setFilePrefix(nextPrefix);
+                    } catch (error) {
+                      console.error("创建文件夹失败", error);
+                      message.error("创建文件夹失败");
+                      return Promise.reject();
+                    }
                   },
                 });
               }}
@@ -846,7 +908,7 @@ const KnowledgeSetDetail = () => {
           <Empty description="暂无知识条目" />
         ) : (
           <Table
-            loading={itemsLoading}
+            loading={itemsLoading || directoriesLoading}
             columns={itemColumns}
             dataSource={pagedItemRows}
             rowKey="id"

frontend/src/pages/KnowledgeManagement/knowledge-management.api.ts

@@ -35,6 +35,22 @@ export function queryKnowledgeItemsUsingGet(setId: string, params?: Record<strin
   return get(`/api/data-management/knowledge-sets/${setId}/items`, params);
 }
 
+// 知识条目目录列表
+export function queryKnowledgeDirectoriesUsingGet(setId: string, params?: Record<string, unknown>) {
+  return get(`/api/data-management/knowledge-sets/${setId}/directories`, params);
+}
+
+// 创建知识条目目录
+export function createKnowledgeDirectoryUsingPost(setId: string, data: Record<string, unknown>) {
+  return post(`/api/data-management/knowledge-sets/${setId}/directories`, data);
+}
+
+// 删除知识条目目录
+export function deleteKnowledgeDirectoryUsingDelete(setId: string, relativePath: string) {
+  const query = new URLSearchParams({ relativePath }).toString();
+  return del(`/api/data-management/knowledge-sets/${setId}/directories?${query}`);
+}
+
 // 知识条目文件搜索
 export function searchKnowledgeItemsUsingGet(params?: Record<string, unknown>) {
   return get("/api/data-management/knowledge-items/search", params);

frontend/src/pages/KnowledgeManagement/knowledge-management.model.ts

@@ -69,6 +69,15 @@ export interface KnowledgeItem {
   updatedBy?: string;
 }
 
+export interface KnowledgeDirectory {
+  id: string;
+  setId: string;
+  name: string;
+  relativePath: string;
+  createdAt?: string;
+  updatedAt?: string;
+}
+
 export interface KnowledgeManagementStatistics {
   totalKnowledgeSets: number;
   totalFiles: number;

scripts/db/data-management-init.sql

@@ -158,6 +158,7 @@ CREATE TABLE IF NOT EXISTS t_dm_knowledge_items (
     sensitivity VARCHAR(50) COMMENT '敏感级别',
     source_dataset_id VARCHAR(36) COMMENT '来源数据集ID',
     source_file_id VARCHAR(36) COMMENT '来源文件ID',
+    relative_path VARCHAR(1000) COMMENT '条目相对路径',
     tags JSON COMMENT '标签列表',
     metadata JSON COMMENT '扩展元数据',
     created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
@@ -174,9 +175,26 @@ CREATE TABLE IF NOT EXISTS t_dm_knowledge_items (
     INDEX idx_dm_ki_valid_from (valid_from),
     INDEX idx_dm_ki_valid_to (valid_to),
     INDEX idx_dm_ki_source_dataset (source_dataset_id),
-    INDEX idx_dm_ki_source_file (source_file_id)
+    INDEX idx_dm_ki_source_file (source_file_id),
+    INDEX idx_dm_ki_relative_path (relative_path)
 ) COMMENT='知识条目表（UUID 主键）';
 
+-- 知识条目目录表
+CREATE TABLE IF NOT EXISTS t_dm_knowledge_item_directories (
+    id VARCHAR(36) PRIMARY KEY COMMENT 'UUID',
+    set_id VARCHAR(36) NOT NULL COMMENT '所属知识集ID（UUID）',
+    name VARCHAR(255) NOT NULL COMMENT '目录名称',
+    relative_path VARCHAR(1000) NOT NULL COMMENT '目录相对路径',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
+    created_by VARCHAR(255) COMMENT '创建者',
+    updated_by VARCHAR(255) COMMENT '更新者',
+    FOREIGN KEY (set_id) REFERENCES t_dm_knowledge_sets(id) ON DELETE CASCADE,
+    UNIQUE KEY uk_dm_kd_set_path (set_id, relative_path),
+    INDEX idx_dm_kd_set_id (set_id),
+    INDEX idx_dm_kd_relative_path (relative_path)
+) COMMENT='知识条目目录表（UUID 主键）';
+
 -- ===========================================
 -- 非数据管理表（如 users、t_data_sources）保持不变
 -- ===========================================