圖數據庫API如何處理的Neo4j記錄

Question

嗨，我嘗試使用運行查詢如下：

Exception in thread "main" java.lang.NoClassDefFoundError: scala/Function0

：

final GraphDatabaseService graphDatabaseService = new EmbeddedGraphDatabase("http://localhost:7474/db/data"); 
ExecutionEngine engine = new ExecutionEngine(graphDatabaseService,StringLogger.DEV_NULL); 
ExecutionResult result = engine.execute("START n=node(0) RETURN n"); 

然而，一個例外是在executiong的時碼發射你能否告訴我如何解決這個問題，任何人都曾經有過這樣的問題？

謝謝。

Answer 1

<dependency> 
    <groupId>org.neo4j</groupId> 
    <artifactId>neo4j-rest-graphdb</artifactId> 
    <version>1.9.M04</version> 
</dependency> 

然後用它在你的java代碼是這樣的：

import org.neo4j.rest.graphdb.RestAPI; 
import org.neo4j.rest.graphdb.RestAPIFacade; 
import org.neo4j.rest.graphdb.query.RestCypherQueryEngine; 
import org.neo4j.rest.graphdb.util.QueryResult; 

import java.util.Map; 

import static org.neo4j.helpers.collection.MapUtil.map; 

public class RestApiTest { 
    public static void main(String[] args) { 
     final RestAPI api = new RestAPIFacade("http://localhost:7474/db/data"); 
     final RestCypherQueryEngine engine = new RestCypherQueryEngine(api); 
     final QueryResult<Map<String,Object>> result = engine.query("start n=node({id}) return n.name, id(n) as id", map("id", 0)); 
     for (Map<String, Object> row : result) { 
      long id=((Number)row.get("id")).longValue(); 
      String name= (String) row.get("n.name"); 
     } 
    } 
}