使用batchInserter批量导入neo4j数据时报错

import org.neo4j.unsafe.batchinsert.BatchInserters;

import org.neo4j.unsafe.batchinsert.BatchInserter;

import org.neo4j.graphdb.Label;

import org.neo4j.graphdb.DynamicLabel;

import java.io.File;

import java.util.Map;

import java.util.HashMap;

import org.neo4j.graphdb.RelationshipType;

import org.neo4j.graphdb.DynamicRelationshipType;





public class RunNeo4jBatch {

    public static void main(String[] args) {

        BatchInserter inserter = null;

        try

        {

            inserter = BatchInserters.inserter(

                    new File( "target/batchinserter-example1" ).getAbsolutePath() );



            Label personLabel = DynamicLabel.label( "Person" );

            inserter.createDeferredSchemaIndex( personLabel ).on( "name" ).create();



            Map<String, Object> properties = new HashMap<String, Object>();



            properties.put( "name", "Mattias" );

            long mattiasNode = inserter.createNode( properties, personLabel );



            properties.put( "name", "Chris" );

            long chrisNode = inserter.createNode( properties, personLabel );



            RelationshipType knows = DynamicRelationshipType.withName( "KNOWS" );

            inserter.createRelationship( mattiasNode, chrisNode, knows, null );

        }

        catch (Exception e) {

            e.printStackTrace();

        }

        finally

        {

            if ( inserter != null )

            {

                inserter.shutdown();

            }

        }

    }

}