理解模式和ne4j-embedded

import org.neo4j.graphdb.*;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;

public class Neo4jEmbeddedExample {
    public static void main(String[] args) {
        // 创建图数据库实例
        GraphDatabaseService graphDb = new GraphDatabaseFactory().newEmbeddedDatabaseBuilder("data/graph.db").newGraphDatabase();

        // 创建节点和关系
        try (Transaction tx = graphDb.beginTx()) {
            Node firstNode = graphDb.createNode();
            firstNode.setProperty("name", "Node 1");

            Node secondNode = graphDb.createNode();
            secondNode.setProperty("name", "Node 2");

            Relationship relationship = firstNode.createRelationshipTo(secondNode, MyRelationshipTypes.KNOWS);
            relationship.setProperty("since", 2000);

            tx.success();
        }

        // 查询节点和关系
        try (Transaction tx = graphDb.beginTx()) {
            for (Node node : graphDb.getAllNodes()) {
                System.out.println("Node: " + node.getProperty("name"));
                for (Relationship rel : node.getRelationships(MyRelationshipTypes.KNOWS, Direction.OUTGOING)) {
                    Node otherNode = rel.getEndNode();
                    System.out.println("  Knows: " + otherNode.getProperty("name"));
                }
            }
            tx.success();
        }

        graphDb.shutdown();
    }

    public enum MyRelationshipTypes implements RelationshipType {
        KNOWS
    }
}