我在以Java(嵌入式模式)执行Cypher查询时出错,这是我的代码:
import org.neo4j.cypher.internal.ExecutionEngine;
import org.neo4j.cypher.internal.ExecutionResult;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;
public class test {
public static void main(String[] args) {
GraphDatabaseFactory graphdbFactory = new GraphDatabaseFactory();
GraphDatabaseService graphdb = new graphdbFactory.newEmbeddedDatabase("C:/Users/dell/Documents/Neo4j");
ExecutionEngine execEngine = new ExecutionEngine(graphDb);
ExecutionResult execResult = execEngine.execute
("MATCH (java:JAVA) RETURN java");
String results = execResult.dumpToString();
System.out.println(results);
}
}
我在一行上遇到错误:GraphDatabaseService graphdb = new graphdbFactory.newEmbeddedDatabase(“ C:/ Users / dell / Documents / Neo4j”); 错误:类型图数据库工厂中的新嵌入式数据库(文件)方法不适用于参数(字符串)
请帮忙
GraphDatabaseFactory.newEmbeddedDatabase()
期望aFile
而不是a String
,请参见http://neo4j.com/docs/java-reference/current/javadocs/org/neo4j/graphdb/factory/GraphDatabaseFactory.html#newEmbeddedDatabase-java.io.File-
另外,也无需使用ExecutionEngine
。只是做一个graphDb.execute(<cypherString>)
。请注意,这适用于Neo4j> = 2.3。
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