# -*- coding: utf-8 -*-
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# neo4j.py
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# @author: lyg
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# @date: 2025-04-24
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# @version: 0.0.1
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# @description: neo4j数据库操作
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from py2neo import Graph, Node, Relationship
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import json
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class Neo4jHelper:
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def __init__(self):
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self.graph = Graph('http://192.168.1.14:7474', user='neo4j', password='123456')
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def create_page_node(self, page_info):
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"""
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创建页面节点
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"""
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# 创建节点
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node = Node("Page", page_num=page_info.page_num,
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chapter_info=json.dumps(page_info.chapter_info, ensure_ascii=False, indent=2),
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text=page_info.text,
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entities=json.dumps(page_info.entities, ensure_ascii=False, indent=2))
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self.graph.create(node)
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return node
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def create_entity_node(self, entity: str):
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"""
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创建实体节点
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"""
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node = self.graph.nodes.match("Entity", text=entity).first()
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if node:
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return node
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node = Node("Entity", text=entity)
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self.graph.create(node)
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return node
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def create_page_entity_relationship(self, page_node, entity_node):
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"""
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创建页面和实体节点的关系
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"""
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relationship = Relationship(page_node, "page_entity", entity_node)
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self.graph.create(relationship)
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return relationship
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def create_entity_relationship(self, entity_node1, entity_node2):
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"""
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创建实体节点的关系
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"""
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if entity_node1 == entity_node2:
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return
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relationship = Relationship(entity_node1, "entity_entity", entity_node2)
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if self.graph.exists(relationship):
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return
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self.graph.create(relationship)
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return relationship
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