Issue of casting Node neo4j

问题

My code is below, As per the documentation it should have given me the node values but it is throwing me exception

Exception in thread "main" java.lang.ClassCastException: scala.collection.convert.Wrappers$SeqWrapper cannot be cast to org.neo4j.graphdb.Node
	at com.neo4j.performance.FetchData.main(FetchData.java:32)

I'm using Neo4j 2.2.2.

import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Result;
import org.neo4j.graphdb.Transaction;
import java.util.Iterator; 
import org.neo4j.helpers.collection.IteratorUtil;




import com.neo4j.enitites.Global;

public class FetchData {
     public static void main(String[] args) throws Exception  
        {

         String nodeResult = null;
         try ( Transaction ignored = Global.db.beginTx();
                  Result result = Global.db.execute( "MATCH path=()-[:route_1*]-() RETURN nodes(path) AS result" ) )
            {
                // START SNIPPET: items
                Iterator<Node> n_column = result.columnAs( "result" );
                for ( Node node : IteratorUtil.asIterable( n_column ) )
                {
                    nodeResult = node + ": " + node.getProperty( "StationCode" );
                }
                // END SNIPPET: items


            }

         System.out.println(nodeResult);
        }
}

I've searched for the error but only 2 or 3 posts are there those also not working. Has anyone came across with this issue or there is something wrong in this code. Thanks

回答1:

Use this snippet instead inside the transaction try-with-resources block:

        for (Object cell : IteratorUtil.asIterable(result.columnAs("result"))) {
            Iterable<Node> nodes = (Iterable<Node>) cell;
            for (Node n : nodes) {
                System.out.println(n);
            }
        }

来源：https://stackoverflow.com/questions/31554217/issue-of-casting-node-neo4j

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