2

I am using CypersQueries to create nodes from java Applicaton. I am following the above link

http://docs.neo4j.org/chunked/milestone/query-create.html

In my javaApplication i used a sample query as above

public class CretaeQuery
{
    public static final String DBPATH="D:/Neo4j/CQL";

    public static void main(String args[])
    {
        GraphDatabaseService path=new EmbeddedGraphDatabase(DBPATH);
        Transaction tx=path.beginTx();
        try
        {
        Map<String, Object> props  = new HashMap<String, Object>();
        props .put( "name", "Sharon" );
        props .put( "position", "Engineer" );

        Map<String, Object> params = new HashMap<String, Object>();
        params.put( "props", props  );

        ExecutionEngine engine=new ExecutionEngine(path);
        ExecutionResult result=engine.execute( "create ({props})", params );
        System.out.println(result);
        tx.success();
        } 
        finally
        {
             tx.finish();
             path.shutdown();

        }
    }
}

when I am running the above Class I am facing the above eror

Exception in thread "main" java.lang.NoClassDefFoundError: com/googlecode/concurrentlinkedhashmap/ConcurrentLinkedHashMap$Builder
    at org.neo4j.cypher.internal.LRUCache.<init>(LRUCache.scala:30)
    at org.neo4j.cypher.ExecutionEngine$$anon$1.<init>(ExecutionEngine.scala:84)
    at org.neo4j.cypher.ExecutionEngine.<init>(ExecutionEngine.scala:84)
    at com.neo4j.CretaeQuery.main(CretaeQuery.java:33)
Caused by: java.lang.ClassNotFoundException: com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Builder
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 4 more

I have no idea why the error is throwing. please suggest me with proper code

4

1 回答 1

1

您的类路径中缺少内容，或者服务器未正确初始化。大约一个月前，concurrenthashmap 作为 jar 放在 /lib 中。这是嵌入式模式还是服务器模式？

于 2012-11-01T07:34:32.503 回答