在Java中检查服务器上是否存在路径
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Check whether the path exists on server or not in Java
提问by Ankit Lamba
I am creating a Java program in which I am uploading file to server on a particular path. I am using jSchfor sftp.
我正在创建一个 Java 程序，在该程序中我将文件上传到特定路径上的服务器。我正在使用jSchfor sftp。
So, before uploading the file, I want to check if the given directory exists on server or not.
因此，在上传文件之前，我想检查服务器上是否存在给定目录。
if(path exists)
//upload file to the location
else
//create the directory and then upload the file.
How do I check the path exists or not?
如何检查路径是否存在？
Note:I am executing the code on a client that will check for the existence of a remote directory on a server. So please don't suggest
File.exists().
注意：我正在客户端上执行代码，该代码将检查服务器上是否存在远程目录。所以请不要建议
File.exists()。
采纳答案by Brian Roach
Reading the Documentation for ChannelSftpit would appear you can just lstatthe directory:
阅读ChannelSftp的文档，您似乎可以只lstat使用目录：
SftpATTRS attrs = channelSftp.lstat(path);
If that throws an exception, it doesn't exist. You can then use channelSftp.mkdir(path)to create it.
如果抛出异常，则它不存在。然后您可以使用channelSftp.mkdir(path)它来创建它。
回答by Rhand
I am not familiar with this library, but from this example code: http://www.jcraft.com/jsch/examples/Sftp.java.htmlit looks like you can use
我不熟悉这个库，但从这个示例代码：http: //www.jcraft.com/jsch/examples/Sftp.java.html看起来你可以使用
ChannelSftp c = ..;
c.ls('<path>')
to retrieve the file, this should tell you whether it exists or not.
要检索文件，这应该告诉您它是否存在。
