如何通过SFTP从服务器检索文件？ [英] How to retrieve a file from a server via SFTP?

问题描述

我试图使用Java从服务器使用SFTP（而不是FTPS）检索文件。我怎样才能做到这一点？

解决方案

另一个选择是考虑查看 JSch图书馆。 JSch似乎是几个大型开源项目的首选库，其中包括Eclipse，Ant和Apache Commons HttpClient等。

它支持用户/通行证和证书基于浏览器的登录，以及所有其他美味的SSH2功能。

这是一个简单的通过SFTP检索的远程文件。错误处理留给读者练习： - ）

  JSch jsch = new JSch（）; 
 
字符串knownHostsFilename =/home/username/.ssh/known_hosts; 
 jsch.setKnownHosts（knownHostsFilename）; 
 
会话会话= jsch.getSession（remote-username，remote-host）; 
 {
 //交互式版本
 //可以选择性地更新指定的known_hosts文件
 //需要实现UserInfo接口
 // MyUserInfo是一个提供的swing实现在
中// examples / Sftp.java在JSch dist 
 UserInfo ui = new MyUserInfo（）; 
 session.setUserInfo（ui）; 
 
 //或非交互式版本。依赖于主机密钥位于已知主机文件
 session.setPassword（remote-password）; 
} 
 
 session.connect（）; 
 
 Channel channel = session.openChannel（sftp）; 
 channel.connect（）; 
 
 ChannelSftp sftpChannel =（ChannelSftp）频道; 
 
 sftpChannel.get（remote-file，local-file）; 
 // OR 
 InputStream in = sftpChannel.get（remote-file）; 
 //根据需要处理输入流
 
 sftpChannel.exit（）; 
 session.disconnect（）; 
  

I'm trying to retrieve a file from a server using SFTP (as opposed to FTPS) using Java. How can I do this?

解决方案

Another option is to consider looking at the JSch library. JSch seems to be the preferred library for a few large open source projects, including Eclipse, Ant and Apache Commons HttpClient, amongst others.

It supports both user/pass and certificate-based logins nicely, as well as all a whole host of other yummy SSH2 features.

Here's a simple remote file retrieve over SFTP. Error handling is left as an exercise for the reader :-)

JSch jsch = new JSch();

String knownHostsFilename = "/home/username/.ssh/known_hosts";
jsch.setKnownHosts( knownHostsFilename );

Session session = jsch.getSession( "remote-username", "remote-host" );    
{
  // "interactive" version
  // can selectively update specified known_hosts file 
  // need to implement UserInfo interface
  // MyUserInfo is a swing implementation provided in 
  //  examples/Sftp.java in the JSch dist
  UserInfo ui = new MyUserInfo();
  session.setUserInfo(ui);

  // OR non-interactive version. Relies in host key being in known-hosts file
  session.setPassword( "remote-password" );
}

session.connect();

Channel channel = session.openChannel( "sftp" );
channel.connect();

ChannelSftp sftpChannel = (ChannelSftp) channel;

sftpChannel.get("remote-file", "local-file" );
// OR
InputStream in = sftpChannel.get( "remote-file" );
  // process inputstream as needed

sftpChannel.exit();
session.disconnect();

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