scp via java

Question

What is the best method of performing an scp transfer via the Java programming language? It seems I may be able to perform this via JSSE, JSch or the bouncy castle java libr

Answer 1

jsCH has worked great for me. Below is an example of a method that will connect to sftp server and download files to specified directory. It is recommended to stay away from disabling StrictHostKeyChecking. Although a little bit more difficult to set up, for security reasons specifying the known hosts should be the norm.

jsch.setKnownHosts("C:\Users\test\known_hosts"); recommended

JSch.setConfig("StrictHostKeyChecking", "no"); - not recommended

import com.jcraft.jsch.*;
 public void downloadFtp(String userName, String password, String host, int port, String path) {


        Session session = null;
        Channel channel = null;
        try {
            JSch ssh = new JSch();
            JSch.setConfig("StrictHostKeyChecking", "no");
            session = ssh.getSession(userName, host, port);
            session.setPassword(password);
            session.connect();
            channel = session.openChannel("sftp");
            channel.connect();
            ChannelSftp sftp = (ChannelSftp) channel;
            sftp.get(path, "specify path to where you want the files to be output");
        } catch (JSchException e) {
            System.out.println(userName);
            e.printStackTrace();


        } catch (SftpException e) {
            System.out.println(userName);
            e.printStackTrace();
        } finally {
            if (channel != null) {
                channel.disconnect();
            }
            if (session != null) {
                session.disconnect();
            }
        }

    }