上传知识图谱crud

src/main/java/com/teaching/backend/controller/KnowGraph/KnowController.java

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+package com.teaching.backend.controller.KnowGraph;
+
+/**
+ * @Author:youhang
+ * @Date:2024-06-09-9:55
+ * @Description:
+ */
+import com.teaching.backend.common.BaseResponse;
+import com.teaching.backend.common.ResultUtils;
+import com.teaching.backend.model.dto.KnowGraph.BaseKnowReturn;
+import com.teaching.backend.model.dto.KnowGraph.KnowRequest;
+import com.teaching.backend.model.dto.KnowGraph.KnowUpdateRequest;
+import com.teaching.backend.model.dto.KnowGraph.RelationshipKnowRequest;
+import com.teaching.backend.model.entity.KnowGraph.Know;
+
+import com.teaching.backend.service.KnowGraph.KnowService;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+
+@RestController
+@RequestMapping("/know")
+public class KnowController {
+
+    private KnowService knowService;
+
+    public KnowController(KnowService knowService) {
+        this.knowService = knowService;
+    }
+
+    //根据 id查询所关联的所有结点
+    @PostMapping ("/query/{id}")
+    public List<Know> queryKnowAllKnowById(@PathVariable Long id) {
+        return knowService.queryKnowAllKnowById(id);
+    }
+
+    //添加知识点
+    @PostMapping("/add")
+    public Know createKnow(@RequestBody KnowRequest knowRequest) {
+        return knowService.createKnow(knowRequest);
+    }
+
+    //修改知识点
+    @PostMapping ("/update")
+    public Know updateKnow(@RequestBody KnowUpdateRequest knowUpdateRequest) {
+        return knowService.updateKnow(knowUpdateRequest);
+    }
+
+
+    //删除知识点
+    @GetMapping ("delete/{id}")
+    public void deleteKnow(@PathVariable Long id) {
+        knowService.deleteKnow(id);
+    }
+
+    //添加知识点与知识点的关系 related
+    @PostMapping ("/addKnowRelatedKnow")
+    public void addKnowRelatedKnow(@RequestBody RelationshipKnowRequest relationshipKnowRequest) {
+        knowService.addKnowRelatedKnow(relationshipKnowRequest);
+    }
+
+    //添加知识点与知识点的关系 related
+    @PostMapping ("/addKnowFatherAndSonKnow")
+    public void addKnowFatherAndSonKnow(@RequestBody RelationshipKnowRequest relationshipKnowRequest) {
+        knowService.addKnowFatherAndSonKnow(relationshipKnowRequest);
+    }
+
+    @GetMapping("/all")
+    public BaseResponse<BaseKnowReturn> getKnowAll(@RequestParam Long id) {
+        BaseKnowReturn baseKnowReturn =knowService.getKnowAll(id);
+        return ResultUtils.success(baseKnowReturn);
+    }
+
+    @GetMapping("/KnowById")
+    public BaseResponse<BaseKnowReturn> getKnowById(@RequestParam Long id) {
+        BaseKnowReturn baseKnowReturn =knowService.getKnowById(id);
+        return ResultUtils.success(baseKnowReturn);
+    }
+
+}

src/main/java/com/teaching/backend/mapper/KnowGraph/KnowRepository.java

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+package com.teaching.backend.mapper.KnowGraph;
+
+/**
+ * @Author:youhang
+ * @Date:2024-06-09-8:59
+ * @Description:
+ */
+
+
+import com.teaching.backend.model.entity.KnowGraph.Know;
+import org.springframework.data.neo4j.repository.Neo4jRepository;
+import org.springframework.data.neo4j.repository.query.Query;
+
+import java.util.List;
+
+public interface KnowRepository extends Neo4jRepository<Know, Long> {
+
+
+    @Query("MATCH (p:Know), (c:Know) WHERE ID(p) = $id AND ID(c) IN $KnowIds CREATE (p)-[:related]->(c),(c)-[:related]->(p)")
+    void addKnowRelatedKnow(Long id, List<Long> KnowIds);
+
+    @Query("MATCH (p:Know), (c:Know) WHERE ID(p) = $id AND ID(c) IN $KnowIds CREATE (p)-[:FatherAndSon]->(c)")
+    void addKnowFatherAndSonKnow(Long id, List<Long> KnowIds);
+
+    @Query("MATCH(n)-[r:related]->(nn:Know) where ID(nn) = $id RETURN n")
+    List<Know> queryKnowAllKnowById(Long id);
+
+
+
+
+}

src/main/java/com/teaching/backend/model/dto/KnowGraph/BaseKnowReturn.java

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+package com.teaching.backend.model.dto.KnowGraph;
+
+/**
+ * @Author:youhang
+ * @Date:2024-07-23-17:30
+ * @Description:
+ */
+
+
+import com.teaching.backend.model.entity.KnowGraph.Links;
+import com.teaching.backend.model.vo.knowGraph.KnowVO;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.Set;
+
+/**
+ * @Author:youhang
+ * @Date:2024-07-22-5:01
+ * @Description:
+ */
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class BaseKnowReturn {
+
+    private Set<KnowVO> knowList;
+
+    private Set<Links>linksList;
+}

src/main/java/com/teaching/backend/model/dto/KnowGraph/KnowRequest.java

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+package com.teaching.backend.model.dto.KnowGraph;
+
+import lombok.Data;
+import org.springframework.data.neo4j.core.schema.Property;
+
+import java.io.Serializable;
+import java.util.List;
+
+@Data
+public class KnowRequest implements Serializable {
+
+
+    /**
+     * 知识点名称
+     */
+    private String name;
+
+    /**
+     * 信息
+     */
+
+    private String info;
+
+
+
+    /**
+     * 知识点所关联的资源
+     */
+    @Property
+    private List<Integer> resourceList;
+
+
+}
+

src/main/java/com/teaching/backend/model/dto/KnowGraph/KnowUpdateRequest.java

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+package com.teaching.backend.model.dto.KnowGraph;
+
+import lombok.Data;
+import org.springframework.data.neo4j.core.schema.Property;
+
+import java.io.Serializable;
+import java.util.List;
+
+@Data
+public class KnowUpdateRequest implements Serializable {
+
+
+    /**
+     * id
+     */
+    private Long id;
+
+    /**
+     * 知识点名称
+     */
+    private String name;
+
+    /**
+     * 信息
+     */
+
+    private String info;
+
+
+    /**
+     * 知识点所关联的资源
+     */
+    @Property
+    private List<Integer> resourceList;
+
+}
+

src/main/java/com/teaching/backend/model/dto/KnowGraph/RelationshipKnowRequest.java

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+package com.teaching.backend.model.dto.KnowGraph;
+
+import lombok.Data;
+
+import java.io.Serializable;
+import java.util.List;
+
+@Data
+public class RelationshipKnowRequest implements Serializable {
+
+    /**
+     * knowid
+     */
+    private Long id;
+
+    /**
+     * 课程id
+     */
+    private List<Long> KnowIds;
+
+}
+

src/main/java/com/teaching/backend/model/entity/KnowGraph/Know.java

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+package com.teaching.backend.model.entity.KnowGraph;
+
+import lombok.Data;
+import org.springframework.data.neo4j.core.schema.GeneratedValue;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.data.neo4j.core.schema.Node;
+import org.springframework.data.neo4j.core.schema.Property;
+
+import java.io.Serializable;
+import java.util.List;
+
+@Node
+@Data
+public class Know implements Serializable {
+
+
+    /**
+     * id
+     */
+    @Id
+    @GeneratedValue
+    private Long id;
+
+
+    /**
+     * 知识点名称
+     */
+    @Property
+    private String name;
+
+    /**
+     * 信息
+     */
+    @Property
+    private String info;
+
+
+    /**
+     * 知识点所关联的资源
+     */
+    @Property
+    private List<Integer> resourceList;
+
+}
+

src/main/java/com/teaching/backend/model/entity/KnowGraph/Links.java

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+package com.teaching.backend.model.entity.KnowGraph;
+
+import lombok.Data;
+import org.springframework.data.neo4j.core.schema.GeneratedValue;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.data.neo4j.core.schema.Node;
+import org.springframework.data.neo4j.core.schema.Property;
+
+/**
+ * @Author:youhang
+ * @Date:2024-07-21-16:32
+ * @Description:
+ */
+@Data
+@Node
+public class Links {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Property
+    private Long source;
+
+    @Property
+    private Long target;
+
+    @Property
+    private String label;
+
+
+}

src/main/java/com/teaching/backend/model/vo/knowGraph/KnowVO.java

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+package com.teaching.backend.model.vo.knowGraph;
+
+import lombok.Data;
+
+import java.io.Serializable;
+import java.util.List;
+
+
+@Data
+public class KnowVO implements Serializable {
+
+
+    /**
+     * id
+     */
+    private Long id;
+
+
+    /**
+     * 知识点名称
+     */
+    private String label;
+
+    /**
+     * 信息
+     */
+    private Long group;
+
+
+    /**
+     * 知识点所关联的资源
+     */
+    private List<Integer> resourceList;
+
+}
+

src/main/java/com/teaching/backend/service/KnowGraph/KnowService.java

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+package com.teaching.backend.service.KnowGraph;
+
+import com.teaching.backend.mapper.KnowGraph.KnowRepository;
+import com.teaching.backend.model.dto.KnowGraph.BaseKnowReturn;
+import com.teaching.backend.model.dto.KnowGraph.KnowRequest;
+import com.teaching.backend.model.dto.KnowGraph.KnowUpdateRequest;
+import com.teaching.backend.model.dto.KnowGraph.RelationshipKnowRequest;
+import com.teaching.backend.model.entity.KnowGraph.Know;
+import com.teaching.backend.model.entity.KnowGraph.Links;
+import com.teaching.backend.model.vo.knowGraph.KnowVO;
+import org.neo4j.driver.internal.InternalRelationship;
+import org.neo4j.driver.types.Node;
+import org.springframework.beans.BeanUtils;
+import org.springframework.data.neo4j.core.Neo4jClient;
+import org.springframework.stereotype.Service;
+
+import javax.annotation.Resource;
+import java.util.*;
+
+/**
+ * @Author:youhang
+ * @Date:2024-07-21-14:46
+ * @Description:
+ */
+@Service
+public class KnowService {
+
+    private KnowRepository knowRepository;
+
+    @Resource
+    private Neo4jClient neo4jClient;
+
+    public KnowService(KnowRepository knowRepository) {
+        this.knowRepository = knowRepository;
+    }
+
+
+    public List<Know> queryKnowAllKnowById(Long id) {
+        return knowRepository.queryKnowAllKnowById(id);
+    }
+
+
+    public Know createKnow(KnowRequest knowRequest ) {
+        Know know = new Know();
+        BeanUtils.copyProperties(knowRequest,know);
+        return knowRepository.save(know);
+    }
+
+
+    public void deleteKnow(Long id) {
+        knowRepository.deleteById(id);
+    }
+
+    public Know updateKnow(KnowUpdateRequest knowUpdateRequest ) {
+        Know know = new Know();
+         know = knowRepository.findById(knowUpdateRequest.getId()).orElseThrow(() -> new RuntimeException("知识点 not found"));
+        BeanUtils.copyProperties(knowUpdateRequest,know);
+        return knowRepository.save(know);
+    }
+
+
+    public void addKnowRelatedKnow( RelationshipKnowRequest relationshipKnowRequest) {
+        knowRepository.addKnowRelatedKnow(relationshipKnowRequest.getId(),relationshipKnowRequest.getKnowIds());
+    }
+    public void addKnowFatherAndSonKnow( RelationshipKnowRequest relationshipKnowRequest) {
+        knowRepository.addKnowFatherAndSonKnow(relationshipKnowRequest.getId(),relationshipKnowRequest.getKnowIds());
+    }
+
+
+    public BaseKnowReturn getKnowAll(Long id) {
+        Collection<Map<String, Object>> all =
+                neo4jClient.query( "match(n:Know)-[r*0..]->(p:Know) where ID(n) = "+id+" return n as `n`,r as `r`,p as `p`,length(r) as `d`").fetch().all();
+
+        Iterator<Map<String, Object>> iterator = all.iterator();
+        Set<KnowVO> knowList = new HashSet<>();
+        Set<Links>linksList = new HashSet<>();
+        KnowVO knowVO;
+        List node2 = new ArrayList<>();
+        Links links;
+        int p = 0;
+        while (iterator.hasNext()) {
+            Map<String, Object> element = iterator.next();
+            Long group = (Long) element.get("d");
+            knowVO = new KnowVO();
+            Node node1 = (Node) element.get("p");
+            Long id1 = node1.id();
+            String name1 = node1.get("name").asString();
+//            String info1 = node1.get("info").asString();
+            knowVO.setId(id1);
+            knowVO.setLabel(name1);
+            knowVO.setGroup(group);
+            knowList.add(knowVO);
+
+            node2 = (List) element.get("r");
+            for (int i = 0; i < node2.size(); i++) {
+                InternalRelationship e = (InternalRelationship) node2.get(i);
+                links = new Links();
+                links.setId(e.id());
+                links.setSource(e.startNodeId());
+                links.setTarget(e.endNodeId());
+                links.setLabel(e.type());
+                linksList.add(links);
+            }
+
+
+        }
+        BaseKnowReturn baseKnowReturn = new BaseKnowReturn(knowList,linksList);
+        System.out.println(baseKnowReturn);
+        return baseKnowReturn;
+    }
+
+    public BaseKnowReturn getKnowById(Long id) {
+        Collection<Map<String, Object>> all =
+                neo4jClient.query( "match(n:Know)-[r*0..2]->(p:Know) where ID(n) = "+id+" return n as `n`,r as `r`,p as `p`,length(r) as `d`").fetch().all();
+
+        Iterator<Map<String, Object>> iterator = all.iterator();
+        Set<KnowVO> knowList = new HashSet<>();
+        Set<Links>linksList = new HashSet<>();
+        KnowVO knowVO;
+        List node2 = new ArrayList<>();
+        Links links;
+        int p = 0;
+        while (iterator.hasNext()) {
+            Map<String, Object> element = iterator.next();
+
+            Long group = (Long) element.get("d");
+            knowVO = new KnowVO();
+            Node node1 = (Node) element.get("p");
+            Long id1 = node1.id();
+            String name1 = node1.get("name").asString();
+//            String info1 = node1.get("info").asString();
+            knowVO.setId(id1);
+            knowVO.setLabel(name1);
+            knowVO.setGroup(group);
+            knowList.add(knowVO);
+
+            node2 = (List) element.get("r");
+            for (int i = 0; i < node2.size(); i++) {
+                InternalRelationship e = (InternalRelationship) node2.get(i);
+                links = new Links();
+                links.setId(e.id());
+                links.setSource(e.startNodeId());
+                links.setTarget(e.endNodeId());
+                links.setLabel(e.type());
+                linksList.add(links);
+            }
+
+
+        }
+        BaseKnowReturn baseKnowReturn = new BaseKnowReturn(knowList,linksList);
+        System.out.println(baseKnowReturn);
+        return baseKnowReturn;
+    }
+
+}