commons.net.telnet使用示例

import org.apache.commons.net.telnet.TelnetClient;

import java.io.IOException;

public class TelnetDemo {

    public static void main(String[] args) throws IOException {
        TelnetClient telnet = new TelnetClient();
        String remoteip = "10.1.1.159";
        int remoteport = 9999;
        telnet.connect(remoteip, remoteport);
        System.out.println(telnet.isAvailable());
        System.out.println(telnet.isConnected());

        IOUtil.readWrite(telnet.getInputStream(), telnet.getOutputStream(),
                System.in, System.out);
        telnet.disconnect();
        System.exit(0);
    }
}

import org.apache.commons.net.io.Util;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * This is a utility class providing a reader/writer capability required
 * by the weatherTelnet, rexec, rshell, and rlogin example programs.
 * The only point of the class is to hold the static method readWrite
 * which spawns a reader thread and a writer thread.  The reader thread
 * reads from a local input source (presumably stdin) and writes the
 * data to a remote output destination.  The writer thread reads from
 * a remote input source and writes to a local output destination.
 * The threads terminate when the remote input source closes.
 * *
 */

public final class IOUtil {

    public static final void readWrite(final InputStream remoteInput,
                                       final OutputStream remoteOutput,
                                       final InputStream localInput,
                                       final OutputStream localOutput) {
        Thread reader, writer;

        reader = new Thread() {
            @Override
            public void run() {
                int ch;

                try {
                    while (!interrupted() && (ch = localInput.read()) != -1) {
                        remoteOutput.write(ch);
                        remoteOutput.flush();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        };


        writer = new Thread() {
            @Override
            public void run() {
                try {
                    Util.copyStream(remoteInput, localOutput);
                } catch (IOException e) {
                    e.printStackTrace();
                    System.exit(1);
                }
            }
        };


        writer.setPriority(Thread.currentThread().getPriority() + 1);
        writer.start();
        reader.setDaemon(true);
        reader.start();

        try {
            writer.join();
            reader.interrupt();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}