Retrieving data from an SFTP server using JSch

Question

I am using JSch for retrieving a file from a remote machine by SFTP. Here is the code

public class TestSFTPinJava {

 public static void main(String args[]) {
        JSch jsch = new JSch();
        Session session = null;
        try {
            session = jsch.getSession("username", "sftp.abc.com", 22);
            session.setConfig("StrictHostKeyChecking", "no");
            session.setPassword("password");
            session.connect();

            Channel channel = session.openChannel("sftp");
            channel.connect();
            ChannelSftp sftpChannel = (ChannelSftp) channel;
            System.out.println("Directory:" + sftpChannel.pwd());
            sftpChannel.cd("remoteDirectory/");
            System.out.println("Directory after cd:" + sftpChannel.pwd());
            sftpChannel.get("remote-data.txt");

            sftpChannel.put("C:\\Users\\mona\\Documents\\local-copy.txt");
            sftpChannel.exit();
            session.disconnect();
        } catch (JSchException e) {
            e.printStackTrace();  
        } catch (SftpException e) {
            e.printStackTrace();
        }
    }
}

Now, I have two questions:

• sftpChannel.get("remote-data.txt"); throws an exception:

  no such file
  at com.jcraft.jsch.ChannelSftp.throwStatusError(ChannelSftp.java:2297)
  at com.jcraft.jsch.ChannelSftp._stat(ChannelSftp.java:1750)
  at com.jcraft.jsch.ChannelSftp.get(ChannelSftp.java:1020)
  at com.jcraft.jsch.ChannelSftp.get(ChannelSftp.java:995)
  at TestSFTPinJava.main(TestSFTPinJava.java:29)

• I am not sure how to specify the location in my local system where the file will be saved. sftpChannel.put("C:\\Users\\mona\\Documents\\localCopy.txt"); does not look right to me.

Please help with suggestions, Thanks!

Answer 1

Concerning your point 1, I suspect that the default directory after connecting is not what you expect. Try using an absolute remote path. Does sftpChannel.pwd() return the directory the file remote-data.txt is in on the remote machine ?

Concerning your point 2, looking at http://grepcode.com/file/repo1.maven.org/maven2/com.jcraft/jsch/0.1.42/com/jcraft/jsch/ChannelSftp.java#290 one sees that there is the following method in ChannelSftp:

 public void put(String src, String dst)

which indeed has a source and destination file name argument.

I guess you had already a look the Jsch sftp example at http://www.jcraft.com/jsch/examples/Sftp.java ?