neo4j图数据库安装实践与报错

在图数据库领域中neo4j应该是使用的非常广泛的一种了，之前研究生期间就安装过这个数据库，后来换了电脑也就没有在尝试使用了，今天想在台式机上重新安装一下。
数据库下载地址在这里
打开后下载我红色线框圈出来的版本即可：

也就是社区版【免费】的windows版本就行了。
下载好了以后直接解压缩即可，如下：

进入文件夹下，目录结构如下所示：

类似java环境变量配置

新建NEO4J_HOME变量，变量值即为neo4j-community-3.5.8所在的路径，之后再系统的path中将bin所在的路径加入到path中，这样就完成了环境变量的配置处理。
接下来启动neo4j,启动命令如下：

1. neo4j.bat console

复制代码

我本地启动直接报错了

报错信息如下：

查阅网上的资料找到一个解决方案是：

1. Set-ExecutionPolicy -ExecutionPolicy RemoteSigned
   
2. Import-Module '（neo4j文件目录）\bin\Neo4j-Management.psd1'
   
3. Invoke-Neo4j console

复制代码

亲测不可行，报错如下：

可能是我使用有误，也可能是报错并非这种方式可以解决的。

下面开始分析上面的错误

其实错误的意思大概就是：

中的什么路径没有找到，那么我们就进入到bin目录下打开这个文件，文件内容如下：

1. # Copyright (c) 2002-2018 "Neo4j,"
   
2. # Neo4j Sweden AB [http://neo4j.com]
   
3. #
   
4. # This file is part of Neo4j.
   
5. #
   
6. # Neo4j is free software: you can redistribute it and/or modify
   
7. # it under the terms of the GNU General Public License as published by
   
8. # the Free Software Foundation, either version 3 of the License, or
   
9. # (at your option) any later version.
   
10. #
    
11. # This program is distributed in the hope that it will be useful,
    
12. # but WITHOUT ANY WARRANTY; without even the implied warranty of
    
13. # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
14. # GNU General Public License for more details.
    
15. #
    
16. # You should have received a copy of the GNU General Public License
    
17. # along with this program.  If not, see <http://www.gnu.org/licenses/>.
    
18. 
    
19. try
    
20. {
    
21.     Unblock-File -Path '%~dp0Neo4j-Management\*.*' -ErrorAction 'SilentlyContinue'
    
22. }
    
23. catch
    
24. {
    
25. };
    
26. 
    
27. Import-Module "$PSScriptRoot\Neo4j-Management.psd1"
    
28. $Arguments = Get-Args $args
    
29. Exit (Invoke-Neo4j -Verbose:$Arguments.Verbose -Command $Arguments.ArgsAsStr)
    
30. 
    
31. 
    
32. # SIG # Begin signature block
    
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124. # SIG # End signature block

复制代码

从上面的内容和启动命令的报错输出结合来看，我们很容易定位到这里：

就是这里的路径除了问题，我并不知道“$PSScriptRoot”这个变量代表的什么意思，感觉有点像环境变量配置里面的NEO4J_HOME一样，既然想到了这里，我就修改了这个相关值为绝对路径值，修改后整个文件内容如下：

1. # Copyright (c) 2002-2018 "Neo4j,"
   
2. # Neo4j Sweden AB [http://neo4j.com]
   
3. #
   
4. # This file is part of Neo4j.
   
5. #
   
6. # Neo4j is free software: you can redistribute it and/or modify
   
7. # it under the terms of the GNU General Public License as published by
   
8. # the Free Software Foundation, either version 3 of the License, or
   
9. # (at your option) any later version.
   
10. #
    
11. # This program is distributed in the hope that it will be useful,
    
12. # but WITHOUT ANY WARRANTY; without even the implied warranty of
    
13. # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
14. # GNU General Public License for more details.
    
15. #
    
16. # You should have received a copy of the GNU General Public License
    
17. # along with this program.  If not, see <http://www.gnu.org/licenses/>.
    
18. 
    
19. try
    
20. {
    
21.     Unblock-File -Path '%~dp0Neo4j-Management\*.*' -ErrorAction 'SilentlyContinue'
    
22. }
    
23. catch
    
24. {
    
25. };
    
26. 
    
27. Import-Module "D:\neo4j\neo4j-community-3.5.8\bin\Neo4j-Management.psd1"
    
28. $Arguments = Get-Args $args
    
29. Exit (Invoke-Neo4j -Verbose:$Arguments.Verbose -Command $Arguments.ArgsAsStr)
    
30. 
    
31. 
    
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124. # SIG # End signature block

复制代码

保存退出之后，重新启动数据库，结果输出如下：

可以看到，neo4j数据库已经成功启动了，到此，算是环境配置结束了。

总结

以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。

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