问使用Java的SSH连接

EN

import java.io.InputStream;
import org.apache.commons.io.IOUtils;


import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;


public class SSHClient {

    /**
     * Constant EXCUTE_CHANNEL
     */
    public static final String EXCUTE_CHANNEL = "exec";

    /**
     * Constant STRICT_KEY_CHECKING
     */
    public static final String STRICT_KEY_CHECKING = "StrictHostKeyChecking";


    /** Name/ip of the remote machine/device **/ 
    private String host;
    private String userName;
    private String password;

    /**
     * This method used to initilze user and host
     * 
     * @param userName
     * @param password
     * @param host
     */
    public SSHClient(String userName,String password, String host) {
        super();
        this.userName = userName;
        this.password = password;
        this.host = host;
    }

    /**
     * This method used to execute commands remotly by using SSHV2
     * 
     * @param host
     * @param username
     * @param password
     * @param command
     * @return
     */
    public String executeCommand(String command) { 
        StringBuilder log = new StringBuilder();
        String response = null;
        Channel channel = null;
        Session session = null;

        try {
            JSch jsch = new JSch();
            JSch.setConfig(STRICT_KEY_CHECKING, Constants.NO);

            session = jsch.getSession(userName, host, 22);


            // If two machines have SSH passwordless logins setup, the following
            // line is not needed:
            session.setPassword(password);
            session.connect();

            channel = session.openChannel(EXCUTE_CHANNEL);
            ((ChannelExec) channel).setCommand(command);

            // channel.setInputStream(System.in);
            channel.setInputStream(null);

            ((ChannelExec) channel).setErrStream(System.err);

            InputStream in = channel.getInputStream();

            channel.connect();

            response = IOUtils.toString(in);

        } catch (Exception ex) {
                //handle exception
        } finally {
            try {
                if (session != null) {
                    session.disconnect();
                }
            } catch (Exception ex) {
                //handle exception
            }
            try {
                if (channel != null) {
                    channel.disconnect();
                }
            } catch (Exception ex) {
                //handle exception
            }

        }
        System.ou.println( "Response received :"+  response));
        return response;
    }
}

import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.StreamGobbler;

Connection conn = new Connection(server);
conn.connect();
boolean isAuthenticated = conn.authenticateWithPassword(user_id, password);

System.out.println("Is server - " + server + " Authenticated? " + isAuthenticated);

if (isAuthenticated == false)
    throw new IOException("Authentication failed.");

ch.ethz.ssh2.Session sess = conn.openSession();
String new_commands = "";

for (int i = 0; i < commands.size(); i++) {
    new_commands = new_commands + commands.get(i) + "\n";
}

System.out.println("The command executed is: " + new_commands);

sess.requestDumbPTY();
sess.execCommand(new_commands);
InputStream stdout = new StreamGobbler(sess.getStdout());
BufferedReader br = new BufferedReader(new InputStreamReader(stdout));
InputStream errStrm = new StreamGobbler(sess.getStderr());
BufferedReader stderrRdr = new BufferedReader(new InputStreamReader(errStrm));
sess.getStdin().write("EXIT\n".getBytes());

System.out.println("the output of the command is");

while (true) {
    String line_out = br.readLine();
    if (line_out == null) {
        break;
    } else {
        System.out.println(line_out);
        output_logs.add(line_out);
    }
}

while (true) {
    String line_error = stderrRdr.readLine();
    if (line_error == null) {
        break;
    } else {
        System.out.println(line_error);
        output_logs.add(line_error);
    }
}

output_logs.add("Exit Code:" + sess.getExitStatus());
System.out.println("ExitCode: " + sess.getExitSignal());

sess.close();
conn.close();