Neo4j - 瀏覽器可視化錯誤

我想爲Neo4j使用'Hello World'。問題是，當我啓動服務器並檢查neo4j的瀏覽器（localhost：7474）時，我看不到任何圖形顯示我的節點。Neo4j - 瀏覽器可視化錯誤

import java.io.File; 

import org.neo4j.graphdb.Direction; 
import org.neo4j.graphdb.GraphDatabaseService; 
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 MyFirstMain 
{ 
    private static final String DB_PATH = "/neo4j/data/graph.db"; 

    public String greeting; 

    // START SNIPPET: vars 
    GraphDatabaseService graphDb; 
    Node firstNode; 
    Node secondNode; 
    Relationship relationship; 
    // END SNIPPET: vars 

    // START SNIPPET: createReltype 
    private static enum RelTypes implements RelationshipType 
    { 
     KNOWS 
    } 
    // END SNIPPET: createReltype 

    public static void main(final String[] args) 
    { 
     MyFirstMain hello = new MyFirstMain(); 
     hello.createDb(); 
//  hello.removeData(); 
//  hello.shutDown(); 
    } 

    void createDb() 
    { 
     // START SNIPPET: startDb 
     graphDb = new GraphDatabaseFactory().newEmbeddedDatabase(DB_PATH); 
     registerShutdownHook(graphDb); 
     // END SNIPPET: startDb 

     // START SNIPPET: transaction 
     try (Transaction tx = graphDb.beginTx()) 
     { 
      // Database operations go here 
      // END SNIPPET: transaction 
      // START SNIPPET: addData 
      firstNode = graphDb.createNode(); 
      firstNode.setProperty("message", "Hello, "); 
      secondNode = graphDb.createNode(); 
      secondNode.setProperty("message", "World!"); 

      relationship = firstNode.createRelationshipTo(secondNode, RelTypes.KNOWS); 
      relationship.setProperty("message", "brave Neo4j "); 
      // END SNIPPET: addData 

      // START SNIPPET: readData 
      System.out.print(firstNode.getProperty("message")); 
      System.out.print(relationship.getProperty("message")); 
      System.out.print(secondNode.getProperty("message")); 
      // END SNIPPET: readData 

      greeting = ((String) firstNode.getProperty("message")) 
        + ((String) relationship.getProperty("message")) 
        + ((String) secondNode.getProperty("message")); 

      // START SNIPPET: transaction 
      tx.success(); 
     } 
     // END SNIPPET: transaction 
    } 

    // START SNIPPET: shutdownHook 
    private static void registerShutdownHook(final GraphDatabaseService graphDb) 
    { 
     // Registers a shutdown hook for the Neo4j instance so that it 
     // shuts down nicely when the VM exits (even if you "Ctrl-C" the 
     // running application). 
     Runtime.getRuntime().addShutdownHook(new Thread() 
     { 
      @Override 
      public void run() 
      { 
       graphDb.shutdown(); 
      } 
     }); 
    } 
    // END SNIPPET: shutdownHook 
}

我不想用別的，除了內置的瀏覽器中的Neo4j的。我應該如何繼續？

在此先感謝。

來源

2015-02-08 harris21

您必須關閉服務器，然後創建您的數據，然後重新啓動服務器，您不能同時使用來自兩個數據庫進程的同一個數據目錄。

你的DB_PATH也是錯誤的，你不能在那裏有明星。

來源

2015-02-08 21:40:04

撇開db_path（我在這裏把星星放在一個通用名稱中），我做了你的建議。似乎db正在工作，但仍然沒有我的節點的可視化表示。：S – harris21 2015-02-08 21:58:56

而且您必須運行查詢來查看您的節點。但只有當你做到以上。 – 2015-02-09 08:09:24

我做了上述，並嘗試使用neo4j默認爲所有節點提供的MATCH n RETURN n LIMIT 25。即使節點設置正確，我的回報也是0。 – harris21 2015-02-09 12:52:03

Neo4j - 瀏覽器可視化錯誤

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