Question

我已经加载了50k个节点，并通过talend建立了它们之间的关系。我编写了java代码来连接neo4j并尝试执行cypher查询。它连接到neo4j但显示错误的结果。我的java代码是：

package com.Neo4J;

import org.neo4j.cypher.javacompat.ExecutionEngine;
import org.neo4j.cypher.javacompat.ExecutionResult;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;

public class CaseNeo4J {

private static final String Neo4J_DBPath="/neo4j-community-1.9.2/data/graph.db";
GraphDatabaseService gdb;

public void connect(){

    gdb = new GraphDatabaseFactory().newEmbeddedDatabase(Neo4J_DBPath);
    Transaction transaction = gdb.beginTx();
    ExecutionEngine engine = new ExecutionEngine(gdb);
    ExecutionResult result = engine.execute( "start n=node(*) return n");
    System.out.println(result.dumpToString());
}

public static void main(String[] args) {

    CaseNeo4J neoobj = new CaseNeo4J();
    neoobj.connect();

}
}

outputs as :
+-----------+
| n         |
+-----------+
| Node[0]{} |
+-----------+
1 row

实际上它应该显示50000个节点，但它显示的是1 ...任何想法？

Answer 1

很抱歉，如果我的inswer太明显但您尝试过：MATCH（n）RETURN n作为查询？

通过java访问neo4j节点和关系

1 个答案: