Neo4j 原生Java API注意点

最新推荐文章于 2025-05-26 15:13:55 发布

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最新推荐文章于 2025-05-26 15:13:55 发布

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分类专栏： Neo4j

本文链接：https://blog.youkuaiyun.com/wangmaohong0717/article/details/80583408

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本文通过一个具体的例子展示了如何使用 Neo4j 的 Java API 进行数据库操作。包括创建节点、设置属性及建立关系等步骤，并强调了正确管理事务的重要性。

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package com.tp.neo4j.java.examples;

import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Relationship;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;

public class Neo4jJavaAPIDBOperation {
public static void main(String[] args) {
	GraphDatabaseFactory dbFactory = new GraphDatabaseFactory();
	GraphDatabaseService db= dbFactory.newEmbeddedDatabase("C:/TPNeo4jDB");
	try (Transaction tx = db.beginTx()) {

		Node javaNode = db.createNode(Tutorials.JAVA);
		javaNode.setProperty("TutorialID", "JAVA001");
		javaNode.setProperty("Title", "Learn Java");
		javaNode.setProperty("NoOfChapters", "25");
		javaNode.setProperty("Status", "Completed");				
		
		Node scalaNode = db.createNode(Tutorials.SCALA);
		scalaNode.setProperty("TutorialID", "SCALA001");
		scalaNode.setProperty("Title", "Learn Scala");
		scalaNode.setProperty("NoOfChapters", "20");
		scalaNode.setProperty("Status", "Completed");
		
		Relationship relationship = javaNode.createRelationshipTo
		(scalaNode,TutorialRelationships.JVM_LANGIAGES);
		relationship.setProperty("Id","1234");
		relationship.setProperty("OOPS","YES");
		relationship.setProperty("FP","YES");
		
		tx.success();
	}
	   System.out.println("Done successfully");
}
}

1、注意修改数据库的地址 neo4j.conf下属性 dbms.active_database

2、一定要关闭Transaction ，不然数据不会实时写入数据库。可以采用上面的写法，也可以在finally里 tx.close()