谁能给一个简单的用java实现telnet的代码，无限感激

[lanbaibai]

telnet 192.168.1.2 (win2000系统)
用户名：user
密码：password

然后应该进入“c:>_”状态

然后执行：dir
列出c盘所有文件列表


怎么做？谁能帮忙写一个代码？ 谢谢了！！

[约翰羊]

关注.up

[demo_demo]

以前在網上看見有這麽一段，不知道對你有用沒，你看看

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Event;
import java.awt.Graphics;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextArea;
import java.awt.TextField;
import java.io.DataInputStream;
import java.io.PrintStream;
import java.net.Socket;
import java.net.UnknownHostException;

public class TelnetApp extends Applet implements Runnable
{
// 声明成员变量

Thread client;

TextArea log;

TextField hostname;

TextField userid;

TextField password;

Label hname;

Label uid;

Label psd;

Button connect;

Button bye;

int wantTime;

boolean logged;

Socket socket = null;

PrintStream os;

DataInputStream is;

public TelnetApp()
{
resize(400, 300);
setLayout(new BorderLayout());
Panel p1 = new Panel();
log = new TextArea(10, 80);
log.setEditable(true);
p1.add(log);
add("North", p1);

Panel p2 = new Panel();
p2.add(hname = new Label("Hostname"));
p2.add(hostname = new TextField(20));
p2.add(uid = new Label("Userid:"));
p2.add(userid = new TextField(10));
p2.add(psd = new Label("Password:"));
p2.add(password = new TextField(10));
password.setEchoCharacter('*');

add("Center", p2);

Panel p3 = new Panel();
p3.add(connect = new Button("Connect"));
p3.add(bye = new Button("Bye"));
bye.disable();
add("South", p3);

logged = false;
}

public void run()
{
String fromServer = null;
byte b[] = new byte[3];
b[0] = (byte) 'n';
while (true)
{
if ((fromServer = getDate()) != null)
log.appendText(fromServer + "\n");
if (wantTime < 0)
{
bye();
break;
}
if (logged)
{
delay(60 * 1000);
log.setText(" ");
wantTime -= 1;
sendData(b, 1);
}
}
}

// 建立主机连接

private boolean connectHost(String hostName)
{
try
{
socket = new Socket(hostName, 23);
os = new PrintStream(socket.getOutputStream());
is = new DataInputStream(socket.getInputStream());
} catch (UnknownHostException e)
{
log.setText("Trying to connect to unknown host:" + e);
return false;
} catch (Exception e)
{
log.setText("Exception:" + e);
return false;
}
return true;
}

// 接收信息

String getDate()
{
String fromServer;
int len;
byte b[] = new byte[1000];
try
{
fromServer = "";
len = is.read(b);

fromServer += new String(b, 0);
} catch (Exception e)
{
log.setText("Exception:" + e);
return null;
}
return fromServer;
}

// 发送信息

boolean sendData(byte b[], int len)
{
try
{
os.write(b, 0, len);
os.flush();
} catch (Exception e)
{
log.setText("Exception:" + e);
return false;
}
return true;
}

// 关闭连接

void closeSocket()
{
try
{
os.close();
is.close();
socket.close();
socket = null;
} catch (Exception e)
{
log.setText("Exception:" + e);
}
}

void toByte(byte[] b, String s)
{
int i;

for (i = 0; i < s.length(); i++)
b[i] = (byte) s.charAt(i);
b[i] = 13;
b[i + 1] = 10;
}

void negotiate()
{
byte b[] = new byte[20];
b[0] = -1;
b[1] = -5;
b[2] = 24;
sendData(b, 3);
delay(400);

b[0] = -1;
b[1] = -6;
b[2] = 24;
b[3] = 0;
b[4] = (byte) 'D';
b[5] = (byte) 'E';
b[6] = (byte) 'C';
b[7] = (byte) '-';
b[8] = (byte) 'V';
b[9] = (byte) 'T';
b[10] = (byte) '1';
b[11] = (byte) '0';
b[12] = (byte) '0';
b[13] = (byte) -1;
b[14] = -16;
sendData(b, 15);
delay(400);

// 其他选项
b[0] = -1;
b[1] = -3;
b[2] = 1;
b[3] = -1;
b[4] = -3;
b[5] = 3;
b[6] = -1;
b[7] = -3;
b[8] = 31;
b[9] = -1;
b[10] = -4;
b[11] = -56;
b[12] = -1;
b[13] = -5;
b[14] = 1;
sendData(b, 15);
delay(400);

// login bbs
toByte(b, "bbs");
sendData(b, 5);
delay(400);
}

void login(String userid, String password)
{
byte b[] = new byte[20];
toByte(b, userid);
sendData(b, userid.length() + 2);
delay(400);

toByte(b, password);
sendData(b, password.length() + 2);
delay(400);
}

boolean enter()
{
if (connectHost(hostname.getText().trim()))
{
log.setText("connected\n");

negotiate();
delay(400);

login(userid.getText().trim(), password.getText().trim());
return true;
} else
return false;
}

void toMainmenu()
{
byte b[] = new byte[20];
for (int i = 0; i < 6; i++)
{
toByte(b, " ");
sendData(b, 2);
}

for (int i = 0; i < 1; i++)
{
b[0] = (byte) 'q';
sendData(b, 1);
delay(200);
}
}

void bye()
{
byte b[] = new byte[20];

for (int i = 0; i < 10; i++)
{
b[0] = (byte) 'q';
sendData(b, 1);
delay(300);
}

b[0] = (byte) 'g';
sendData(b, 1);
delay(300);
for (int i = 0; i < 6; i++)
{
toByte(b, "");
sendData(b, 2);
delay(300);
}
client.stop();
client = null;
closeSocket();
connect.enable();
bye.disable();
}

void delay(int millisecond)
{
try
{
Thread.sleep(millisecond);
} catch (InterruptedException e)
{
}
}

public boolean action(Event e, Object arg)
{
switch (e.id)
{
case Event.ACTION_EVENT:
if (e.target == connect)
{
wantTime = 20;
connect.disable();
bye.enable();
client = new Thread(this);
client.start();
if (enter())
toMainmenu();
logged = true;
} else if (e.target == bye)
bye();
}
return true;
}

public void destroy()
{
}

public void paint(Graphics g)
{
}

public void start()
{
}

public void stop()
{
}
}

[cl55]

http://downloads.sourceforge.net/jta/jta25b-src.jar?modtime=1033344000&big_mirror=0

The Java(tm) Telnet Applet is a fully featured telnet/SSH program that allows users to connect and login to remote hosts via the Internet or an Intranet using only their WWW Browser.

完整的TELNET，刚刚给你找的。 是开源的，上面的地址就是下源码的。

[qjyh]

呵呵，我用的是jta26