Ich habe ein Programm zum Verbinden mit einer SSH-Shell. Ich konnte die Befehle ausführen und die Ausgabe lesen.

Aber ich habe eine neue Anforderung. Jetzt muss ich einen Befehl ausführen und die Ausgabe lesen, wenn der nächste Befehl erfolgreich ausgeführt wurde.

Ich habe das Programm aus dieser Frage verwendet:JSch Problem - Kann nicht die vollständige Befehlsausgabe abrufen

public class SshConnectionManager {

    private static Session session;
    private static ChannelShell channel;
    private static String username = "";
    private static String password = "";
    private static String hostname = "";


    private static Session getSession(){
        if(session == null || !session.isConnected()){
            session = connect(hostname,username,password);
        }
        return session;
    }

    private static Channel getChannel(){
        if(channel == null || !channel.isConnected()){
            try{
                channel = (ChannelShell)getSession().openChannel("shell");
                channel.setPty(false);
                channel.connect();

            }catch(Exception e){
                System.out.println("Error while opening channel: "+ e);
            }
        }
        return channel;
    }

    private static Session connect(String hostname, String username, String password){

        JSch jSch = new JSch();

        try {

            session = jSch.getSession(username, hostname, 22);
            Properties config = new Properties(); 
            config.put("StrictHostKeyChecking", "no");
            session.setConfig(config);
            session.setPassword(password);

            System.out.println("Connecting SSH to " + hostname + " - Please wait for few seconds... ");
            session.connect();
            System.out.println("Connected!");
        }catch(Exception e){
            System.out.println("An error occurred while connecting to "+hostname+": "+e);
        }

        return session;

    }

    private static void executeCommands(List<String> commands){

        try{
            Channel channel=getChannel();

            System.out.println("Sending commands...");
            sendCommands(channel, commands);

            readChannelOutput(channel);
            System.out.println("Finished sending commands!");

        }catch(Exception e){
            System.out.println("An error ocurred during executeCommands: "+e);
        }
    }

    private static void sendCommands(Channel channel, List<String> commands){

        try{
            PrintStream out = new PrintStream(channel.getOutputStream());

            out.println("#!/bin/bash");
            for(String command : commands){
                out.println(command);
            }
            out.println("exit");

            out.flush();
        }catch(Exception e){
            System.out.println("Error while sending commands: "+ e);
        }

    }

    private static void readChannelOutput(Channel channel){

        byte[] buffer = new byte[1024];

        try{
            InputStream in = channel.getInputStream();
            String line = "";
            while (true){
                while (in.available() > 0) {
                    int i = in.read(buffer, 0, 1024);
                    if (i < 0) {
                        break;
                    }
                    line = new String(buffer, 0, i);
                    System.out.println(line);
                }

                if(line.contains("logout")){
                    break;
                }

                if (channel.isClosed()){
                    break;
                }
                try {
                    Thread.sleep(1000);
                } catch (Exception ee){}
            }
        }catch(Exception e){
            System.out.println("Error while reading channel output: "+ e);
        }

    }

    public static void close(){
        channel.disconnect();
        session.disconnect();
        System.out.println("Disconnected channel and session");
    }


    public static void main(String[] args){
        List<String> commands = new ArrayList<String>();
        commands.add("ls -l");

        executeCommands(commands);
        close();
    }
}

Ich muss "shell" -Kanal anstelle von "exec" verwenden, da der Server den "exec" -Kanal nicht zulässt:http: //www.tembria.com/forums/viewtopic.php? t = 477 & sid = 8f2a82ec30e89ba44d184a3b2a65ec69