java - Neo4j 3.5 中的事务未实现 java.lang.AutoCloseable

Question

我已经安装了 Neo4j 的社区版 3.5.0-alpha07，并且我正在尝试创建一个简单的图，其中包含以下两个节点this教程。问题是来自 org.neo4j.graphdb.Transaction 的关键字 Transaction 显示语法错误。代码如下:

Operation.java

import java.io.File;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Label;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Relationship;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;

public class Operation {

    //private static final File file =new File();

    public static void main(String[] args) {

        GraphDatabaseFactory dbFactory = new GraphDatabaseFactory();
        GraphDatabaseService db= dbFactory.newEmbeddedDatabaseBuilder("C:\\Users\\pritom.mazumdar\\Downloads\\neo4j-community-3.5.0-alpha07\\data\\databases\\graph.db").newGraphDatabase();
        //Transaction tx = db.beginTx();
        try (Transaction tx = db.beginTx()) {

The resource type Transaction does not implement java.lang.AutoCloseable

            Node javaNode = db.createNode();
            javaNode.setProperty("TutorialID", "JAVA001");
            javaNode.setProperty("Title", "Learn Java");
            javaNode.setProperty("NoOfChapters", "25");
            javaNode.setProperty("Status", "Completed");                

            Node scalaNode = db.createNode();
            scalaNode.setProperty("TutorialID", "SCALA001");
            scalaNode.setProperty("Title", "Learn Scala");
            scalaNode.setProperty("NoOfChapters", "20");
            scalaNode.setProperty("Status", "Completed");

            Relationship relationship = javaNode.createRelationshipTo(scalaNode, (RelationshipType) Label.label("JVM_LANG"));
            relationship.setProperty("Id","1234");
            relationship.setProperty("OOPS","YES");
            relationship.setProperty("FP","YES");

            tx.success();
        } 
           System.out.println("Done successfully");

        }

    }

我已经尝试实现AutoCloseable并覆盖close方法，但它仍然不起作用，语法错误仍然存​​在。

Answer 1

这是因为 try-with-resources 只接受 AutoCloseable 对象。编译器说 Transaction 不是 AutoCloseable。