SFTP + Java

[Bumsys]

/*
* Created on Feb 21, 2008
*
*/
package sftp;

/**
* @author Ilya Lakhmitski
*
*/
import com.jcraft.jsch.*;
import java.io.*;
import java.util.*;

/**
* This class is used to demonstrate the usage of the
* JCraft JSch package to SFTP files.
*
* @author Tim Archer 04/20/07
* @version $Revision: 1.1 $
*/
public class TestJSch {

/** Creates a new instance of TestCommonsNet */
public TestJSch() {
}

/**
* main - Unit test program
* @param args Command line arguments
*
*/
public static void main(String[] args) {
try {
String ftpHost = "10.64.3.27";
int ftpPort = 21;//14147;
String ftpUserName = "anabolik";
String ftpPassword = "";
String ftpRemoteDirectory = "/home/tarcher/tmp/";
String fileToTransmit = "c:\\temp\\test.txt";

//
//First Create a JSch session
//
System.out.println("Creating session.");
JSch jsch = new JSch();
Session session = null;
Channel channel = null;
ChannelSftp c = null;

//
//Now connect and SFTP to the SFTP Server
//
try {
//Create a session sending through our username and
password
session = jsch.getSession(ftpUserName, ftpHost,
ftpPort);
System.out.println("Session created.");
session.setPassword(ftpPassword);
//Security.addProvider(new
com.sun.crypto.provider.SunJCE());

//
//Setup Strict HostKeyChecking to no so we dont get
the
//unknown host key exception
//
java.util.Properties config = new
java.util.Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.connect();
System.out.println("Session connected.");

//
//Open the SFTP channel
//
System.out.println("Opening Channel.");
channel = session.openChannel("sftp");
channel.connect();
c = (ChannelSftp)channel;
} catch (Exception e) {
System.err.println("Unable to connect to FTP server.
"+e.toString());
throw e;
}

//
//Change to the remote directory
//
System.out.println("Changing to FTP remote dir: " +
ftpRemoteDirectory);
c.cd(ftpRemoteDirectory);

//
//Send the file we generated
//
try {
File f = new File(fileToTransmit);
System.out.println("Storing file as remote filename: "
+ f.getName());
c.put(new FileInputStream(f), f.getName());
} catch (Exception e) {
System.err.println("Storing remote file failed.
"+e.toString());
throw e;
}

//
//Get the list of files in the remote server directory
//
Vector files = c.ls(ftpRemoteDirectory);

//
//Log if we have nothing to download
//
if (files.size() == 0) {
System.out.println("No files are available for
download.");
}
//
//Otherwise download all files except for the . and ..
entries
//
else {
for (int i=0; i<files.size(); i++) {
com.jcraft.jsch.ChannelSftp.LsEntry lsEntry =
(com.jcraft.jsch.ChannelSftp.LsEntry) files.get(i);

if (!lsEntry.getFilename().equals(".") && !
lsEntry.getFilename().equals("..")) {
System.out.println("Downloading file
"+lsEntry.getFilename());

String outputFileName = "c:\\temp\
\"+lsEntry.getFilename();

//Get the write and write it to our local file
system
File f = new
File(outputFileName);
c.get(lsEntry.getFilename(), new
FileOutputStream(f));

//
//Remove the file from the server
//
/*
c.rm(lsEntry.getFilename());
*/
}
}
}

//
//Disconnect from the FTP server
//
try {
c.quit();
} catch (Exception exc) {
System.err.println("Unable to disconnect from FTP
server. " + exc.toString());
}

} catch (Exception e) {
System.err.println("Error: "+e.toString());
}

System.out.println("Process Complete.");
System.exit(0);
}
}

I have errors
Creating session.
Session created.
Unable to connect to FTP server. com.jcraft.jsch.JSchException:
connection is closed by foreign host
Process Complete.
Error: com.jcraft.jsch.JSchException: connection is closed by foreign
host.
What can I do that I have not errors?

 

[Ulrich Eckhardt]

int ftpPort = 21;//14147;

FTP port != SFTP port

Other than that, try to reduce your examples to the smallest possible amount
of code that demonstrates the problem. Quoting version IDs from source
control for sure is not required.

Uli

 

[Bumsys]

Can you give me such small example that works?

 

[Alex.From.Ohio.Java]

Can you give me such small example that works?

Look here for Java SSH/SSH2/SFTP implementation:

http://www.jcraft.com/jsch/

Alex.
http://www.myjavaserver.com/~alexfromohio/