Question

I’m looking for a dead simple Java Library to use for SFTP file transfers. I don’t need any other features beyond that.

I’ve tried Zehon’s, but it’s incredible naggy, and I think 8 jar files is a bit crazy for so little functionality as I require.

And the library have to be free (as in free beer), and preferable Open Source (not a requirement).

Thanks.

Answer 1

Edit : I’m going to keep my previous answer, as JSch is still used in many places, but if you need a better-documented library, you can use sshj. An example in how to use it to do sftp is :

SSHClient ssh = new SSHClient();
ssh.loadKnownHosts();
ssh.connect("host");
try {
    ssh.authPassword("username", "password");
    SFTPClient sftp = ssh.newSFTPClient();
    try {
        sftp.put(new FileSystemFile("/path/of/local/file"), "/path/of/ftp/file");
    } finally {
        sftp.close();
    }
} finally {
    ssh.disconnect();
}

---

Using JSch (a java ssh lib, used by Ant for example), you could do something like that :

Session session = null;
Channel channel = null;
try {
    JSch ssh = new JSch();
    ssh.setKnownHosts("/path/of/known_hosts/file");
    session = ssh.getSession("username", "host", 22);
    session.setPassword("password");
    session.connect();
    channel = session.openChannel("sftp");
    channel.connect();
    ChannelSftp sftp = (ChannelSftp) channel;
    sftp.put("/path/of/local/file", "/path/of/ftp/file");
} catch (JSchException e) {
    e.printStackTrace();
} catch (SftpException e) {
    e.printStackTrace();
} finally {
    if (channel != null) {
        channel.disconnect();
    }
    if (session != null) {
        session.disconnect();
    }
}

You can use JSch directly this way, or through Commons VFS, but then you’ll have to have both commons vfs jar and jsch jar.