Question

我在java中创建了节点和关系，它们的值来自数据库并将被动态分配。

GraphDatabaseService graphDb= new GraphDatabaseFactory().newEmbeddedDatabase("D://MyGraph);
//Data access logic Code here
.............
while(rs.next())
{
    String node1=   rs.getString("App_Name"); 
    String rel  =   rs.getString("Interface_Name");
    String node2=   rs.getString("Corresponding_App");
    Transaction tx=graphDb.beginTx();       
    try{        
        RelationshipType rel1 =DynamicRelationshipType.withName(rel);                       
        Node nodeName1 = graphDb.createNode(); 
        Node nodeName2 = graphDb.createNode();                  
        nodeName1.addLabel(DynamicLabel.label((node1)));                    
        nodeName1.setProperty("name", (node1));
        nodeName2.addLabel(DynamicLabel.label((node2)));                    
        nodeName2.setProperty("name", (node2));
        nodeName1.createRelationshipTo(nodeName2, rel1);
        tx.success();
        ...
    }
    ...
}

但是我收到了错误 -

"java.lang.AbstractMethodError: org.neo4j.graphdb.index.IndexProvider.load(Lorg/neo4j/graphdb/DependencyResolver;)Lorg/neo4j/graphdb/index/IndexImplementation;  at org.neo4j.graphdb.index.IndexProviderKernelExtensionFactory$IndexProviderKernelExtension.start(IndexProviderKernelExtensionFactory.java:72)
       at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:498)"

请指导。

Answer 1

正如Stefan已经建议的那样，你的版本与你的罐子有冲突。我强烈建议您使用maven或gradle来管理您的依赖项。 Neo4j 2.0.1具有以下依赖关系，以防您仍想手动将它们添加到项目中：

[INFO] \- org.neo4j:neo4j:jar:2.0.1:compile
[INFO]    +- org.neo4j:neo4j-kernel:jar:2.0.1:compile
[INFO]    |  \- org.apache.geronimo.specs:geronimo-jta_1.1_spec:jar:1.1.1:compile
[INFO]    +- org.neo4j:neo4j-lucene-index:jar:2.0.1:compile
[INFO]    |  \- org.apache.lucene:lucene-core:jar:3.6.2:compile
[INFO]    +- org.neo4j:neo4j-graph-algo:jar:2.0.1:compile
[INFO]    +- org.neo4j:neo4j-udc:jar:2.0.1:compile
[INFO]    +- org.neo4j:neo4j-graph-matching:jar:2.0.1:compile
[INFO]    +- org.neo4j:neo4j-cypher:jar:2.0.1:compile
[INFO]    |  +- org.neo4j:neo4j-cypher-commons:jar:2.0.1:compile
[INFO]    |  +- org.neo4j:neo4j-cypher-compiler-1.9:jar:2.0.1:compile
[INFO]    |  +- org.neo4j:neo4j-cypher-compiler-2.0:jar:2.0.1:compile
[INFO]    |  |  \- org.parboiled:parboiled-scala_2.10:jar:1.1.6:compile
[INFO]    |  |     \- org.parboiled:parboiled-core:jar:1.1.6:compile
[INFO]    |  +- com.googlecode.concurrentlinkedhashmap:concurrentlinkedhashmap-lru:jar:1.3.1:compile
[INFO]    |  \- org.scala-lang:scala-library:jar:2.10.3:compile
[INFO]    \- org.neo4j:neo4j-jmx:jar:2.0.1:compile

Answer 2

这看起来很像是在你的类路径上混合版本的Neo4j。确保所有Neo4j jar都使用相同的版本，类路径上没有重复的jar，并且所有依赖项都已到位。

如果需要进一步的帮助，请在此处附加当前的类路径设置。

在java中创建Neo4j关系时出错

2 个答案: