import org.apache.commons.net.telnet.TerminalTypeOptionHandler; //导入依赖的package包/类
@Override
protected void assertConnect(String term) throws Exception {
  client.setOptionHandler(new EchoOptionHandler(false, false, true, true));
  if (binary) {
    client.setOptionHandler(new SimpleOptionHandler(0, false, false, true, true));
  }
  if (term != null) {
    client.setOptionHandler(new TerminalTypeOptionHandler(term, false, false, true, false));
  }
  client.connect("localhost", 4000);
}
 

import org.apache.commons.net.telnet.TerminalTypeOptionHandler; //导入依赖的package包/类
@Before
public void before() throws Exception {
  vertx = Vertx.vertx();
  client = new TelnetClient();
  client.addOptionHandler(new EchoOptionHandler(false, false, true, true));
  client.addOptionHandler(new SimpleOptionHandler(0, false, false, true, true));
  client.addOptionHandler(new TerminalTypeOptionHandler("xterm-color", false, false, true, false));
}
 

import org.apache.commons.net.telnet.TerminalTypeOptionHandler; //导入依赖的package包/类
public void connect() throws TransportException {
	logger.info("Telnet Transport trying to connect...");

	// Create a new telnet client
	telnetClient = new TelnetClient();

	// VT100 terminal type will be subnegotiated
	TerminalTypeOptionHandler ttopt = new TerminalTypeOptionHandler("VT100", false, false, true, false);
	// WILL SUPPRESS-GA, DO SUPPRESS-GA options
	SuppressGAOptionHandler gaopt = new SuppressGAOptionHandler(true, true, true, true);
	// WON'T ECHO, DON'T ECHO
	EchoOptionHandler echoopt = new EchoOptionHandler();

	try {
		// set telnet client options
		telnetClient.addOptionHandler(ttopt);
		telnetClient.addOptionHandler(gaopt);
		telnetClient.addOptionHandler(echoopt);

		// connect
		telnetClient.connect(host, Integer.parseInt(port));

		// set the read timeout
		telnetClient.setSoTimeout(READ_TIMEOUT);

		// Initialize the print writer
		outPrint = new PrintWriter(telnetClient.getOutputStream(), true);
	} catch (Exception e) {
		e.printStackTrace();
		throw new TransportException("Could not connect, unable to open telnet session " + e.getMessage());
	}
}
 

import org.apache.commons.net.telnet.TerminalTypeOptionHandler; //导入依赖的package包/类
public void connect() throws TransportException {
	logger.info("Telnet Transport trying to connect...");
	
	//Create a new telnet client
	telnetClient = new TelnetClient();

	//VT100 terminal type will be subnegotiated
       TerminalTypeOptionHandler ttopt = new TerminalTypeOptionHandler("VT100", false, false, true, false);
       //WILL SUPPRESS-GA, DO SUPPRESS-GA options
       SuppressGAOptionHandler gaopt = new SuppressGAOptionHandler(true, true, true, true);
       //WON'T ECHO, DON'T ECHO
       EchoOptionHandler echoopt = new EchoOptionHandler();
       
       try{
       	//set telnet client options
       	telnetClient.addOptionHandler(ttopt);
       	telnetClient.addOptionHandler(gaopt);
       	telnetClient.addOptionHandler(echoopt);

       	//connect
       	telnetClient.connect(host, Integer.parseInt(port));
       	
       	//set the read timeout
       	telnetClient.setSoTimeout(READ_TIMEOUT);
       	
       	//Initialize the print writer
       	outPrint=new PrintWriter(telnetClient.getOutputStream(),true);
       }catch(Exception e){
       	e.printStackTrace();
		throw new TransportException("Could not connect, unable to open telnet session "+ e.getMessage());
       }
}