build.gradle

dependencies {
        compile group: 'com.hierynomus', name: 'sshj', version: '0.23.0'
        compile group: 'org.bouncycastle', name: 'bcpkix-jdk15on', version: '1.57'
        compile group: 'org.bouncycastle', name: 'bcprov-jdk15on', version: '1.57'
}

SSHJmx.java

import net.schmizz.sshj.SSHClient;
import net.schmizz.sshj.connection.channel.direct.Session;
import net.schmizz.sshj.sftp.SFTPClient;
import net.schmizz.sshj.transport.verification.PromiscuousVerifier;
import net.schmizz.sshj.userauth.keyprovider.PKCS8KeyFile;
import net.schmizz.sshj.userauth.method.AuthPublickey;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import java.nio.file.Files;
import java.nio.file.Paths;

@Component
public class SSHJmx {

    private final Logger logger = LoggerFactory.getLogger(getClass());

    public static void main(String[] args) throws Exception {
        new SSHJmx().doTransfer();
    }

    void doTransfer() {
        try {
            testTransfer(
                "/tmp/conc/testfile.t1", "/tmp/testfile.t1.transfered", "root", "13.0.0.5",
                    new String(Files.readAllBytes(Paths.get("/tmp/conc/conc")))
            );
        } catch (Exception e){
            logger.error("status=fatal, msg={}", e.getMessage(), e);
        }
    }

    public static void testTransfer(String source, String target, String user, String hostname, String privateKeyContent) throws Exception {
        final SSHClient ssh = new SSHClient();
        ssh.loadKnownHosts();
        ssh.addHostKeyVerifier(new PromiscuousVerifier());
        ssh.connect(hostname);
        try {
            final PKCS8KeyFile keyFile = new PKCS8KeyFile();
//            keyFile.init(new File("/tmp/conc/conc"));
            keyFile.init(privateKeyContent, privateKeyContent);
            ssh.auth(user, new AuthPublickey(keyFile));

            try (SFTPClient sftp = ssh.newSFTPClient()) {
                sftp.put(source, target);
            }
            try (Session.Command command = ssh.startSession().exec("ls -lha " + target)) {
                System.out.println("-------------------------\nOUT");
                System.out.println(IOUtils.toString(command.getErrorStream()));
                System.out.println(IOUtils.toString(command.getInputStream()));
            }
        } finally {
            ssh.disconnect();
        }
    }
}