如何使用Java连接到本地安装的neo4j服务器 [英] How to connect to a locally installed neo4j server using Java

问题描述

我是Neo4J的新手，尽管我花了几个小时的谷歌搜索，却无法找到我的问题的答案。

I'm new to Neo4J and couldn't find the answer to my question despite my hours of googling.

到目前为止，我一直在关注这些教程和现在我对如何/何时使用Neo4j有了基本的了解。现在，我即将开始修改我的hello-world代码并连接到我机器上本地安装的Neo4J服务器，可通过 http： //127.0.0.1:7474 。

So far, I have been following the tutorials and now I have a basic understanding of how/when to use Neo4j. Now, I am about to start modifying my hello-world code and connect to a Neo4J server locally installed on my machine, accessible via http://127.0.0.1:7474.

原始连接（使用嵌入式数据库）：

Original connection (using an embedded database):

GraphDatabaseService gdb = new EmbeddedGraphDatabase("c:\\helloworld\\data\\graph.db");

问题是无论如何要修改此行以连接到c中的服务器数据库： \ neo4j\data\graph.db而不是？服务器当前正在作为Windows服务运行，我可以使用Web管理工具查看其数据库。目前，我对使用REST API不感兴趣，因为服务器和客户端应用程序在同一台机器上运行。

The question is is there anyway to modify this line to connect to my "server" database in c:\neo4j\data\graph.db instead? The server is running currently as a windows service and I can view its database using the web admin tool. At this time, I am not interested in using the REST API since the server and the client app are running on the same machine.

我觉得我错过了什么这里显而易见...

I feel like I'm missing something obvious here...

推荐答案

Windows服务公开REST接口。

The windows service exposes the REST interface.

嵌入式界面完全不同 - 您将其指向数据库文件结构，然后通过Java方法调用访问它。

The embedded interface is entirely different - you point it at the database file structure and then access it via Java method calls.

如果您同时运行两者时间，指向相同的数据，然后可能发生坏事（实际上，我认为它会检测到并阻止它）。因此，您可能需要停止服务和/或将数据从此实例备份到另一个目录。然后编辑 EmbeddedGraphDatabase 构造函数以指向此目录。

If you have both running at the same time, pointing at the same data, then bad things might happen (actually, I think it detects this and prevents it). So you probably need to stop the service and/or backup the data from this instance to another directory. Then edit your EmbeddedGraphDatabase constructor to point to this directory.

手册描述了嵌入式Java界面，正如您可能已经看到的那样。另请参阅本节，其中简要介绍了相当不错的基于Web的管理界面。

The manual describes the embedded Java interface, as you've probably seen. See also this section which briefly mentions the rather nice web-based management interface.

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