急求java实现telnet登陆全过程的源码

mxx123 2009-06-10 10:59:29

小弟急求java实现telnet登陆全过程的源码！
我目前简单写了下，可是总通不过，以下就是我写的了



import   java.io.*;   

  import   java.net.Socket;   

    

  public   class   TelnetExample   {   

  public   static   int   hand(InputStream   is,   OutputStream   os)   throws   IOException   {   

  while(true)   {   

  int   ch   =   is.read();   

  if(ch   <   0   ||   ch   !=   255)   

  return   ch;   

  int   cmd   =   is.read();   

  int   opt   =   is.read();   

  switch(opt)   {   

  case   1: //   echo协商选项,本程序未处理   

  break;   

  case   3: //   supress   go-ahead(抑制向前选项)   

  break;     

  case   24: //   terminal   type(终端类型选项)   

  if(cmd   ==   253)   {   

  os.write(255);   

  os.write(251);   

  os.write(24);   

    

  os.write(255);   

  os.write(250);   

  os.write(24);   

  os.write(0);   

  os.write("dumb".getBytes());   

  os.write(255);   

  os.write(240);   

  }   else   if   (cmd   ==   250)   {   

  ByteArrayOutputStream   baos   =   new   ByteArrayOutputStream();   

  int   svr   =   is.read();   

  while(svr   !=   240)   {   

  baos.write(svr);   

  svr   =   is.read();   

  }   

  System.out.println("Svr:"   +   baos.toString());   

  }   

  break;   

  default:   

  if   (cmd   ==   253)   {   

  os.write(255);   

  os.write(252);   

  os.write(opt);   

  }   

  }   

  }   

  }   

  public   static   void   main(String[]   args)   throws   Exception   {   

  Socket   s   =   new   Socket("192.168.180.20",23);   

  InputStream   is   =   s.getInputStream();   

  OutputStream   os   =   s.getOutputStream();   

  System.out.println(hand(is,os));   

    

  os.write("administrator".getBytes());   

  os.write("zxcvbnm123\n".getBytes());   

  BufferedReader   br   =   new   BufferedReader(new   InputStreamReader(is));   

  char[]   buf   =   new   char[1024];   

  int   read   =   br.read(buf);     

  while(read   >   0)   {   

  System.out.println(new   String(buf,0,read));   

  read   =   br.read(buf);   

  }   

  }   

  }

上面你这段代码每次都是到让输入用户名密码这里过不去啊，控制台里显示“login: administratorzxcvbnm123”就卡住了，在控制台里输入其他信息也没有响应，求大虾们帮忙解决一下
能实现完整telnet登陆过程，并能在控制台交互就可以啊，如有更好的源程序也希望能提供下啊，谢谢了！

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xiongzh19 2010-01-08

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请问楼上org.apache.commons.net.telnet的这个包从哪里来的？我查看了下tomcat5的lib里面并没有发现，可以的话最好能提供下载地址，谢谢！

alpsdyk2001 2009-08-06

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import org.apache.commons.net.telnet.*;
import java.io.*;

public class TmhTelnet {
private static TelnetClient tc = null;
private InputStream in;
private PrintStream out;
public static void main(String args[]) {
new TmhTelnet("192.168.0.37", 23, "administrator", "222");
}

public TmhTelnet(String host, int port, String username, String password) {
byte[] a = new byte[1024];
if (intconnect(host, port)) {
write(username);
write(password);
writescript("command.txt");//dir
closeconnect();

}
}

private void writescript(String filename) {
try {
if (new File(filename).exists()) {
FileReader f = new FileReader(filename);
BufferedReader reader = new BufferedReader(f);
String command = "";
while (command != null) {
command = reader.readLine();
write(command);
}
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

public void write(String command) {
try {
System.out.println("command:>>>>>>>>>" + command);
out.println(command);
out.flush();
printresponse2();
//for(int i=0;i<800000000;i++);
//应该使用线程同步使程序在接受到对方相应后再执行下一条命令这里使用for循环来模拟对方的相应时间
} catch (Exception e) {
e.printStackTrace();
}
}

private boolean intconnect(String host, int port) {
try {
tc = new TelnetClient();
TerminalTypeOptionHandler ttopt = new TerminalTypeOptionHandler(
"VT100", false, false, true, false);
EchoOptionHandler echoopt = new EchoOptionHandler(true, false,
true, false);
SuppressGAOptionHandler gaopt = new SuppressGAOptionHandler(true,
true, true, true);

tc.addOptionHandler(ttopt);
tc.addOptionHandler(echoopt);
tc.addOptionHandler(gaopt);
tc.connect(host, port);
in = tc.getInputStream();
out = new PrintStream(tc.getOutputStream());
return true;
} catch (Exception e) {
e.printStackTrace();
try {
tc.disconnect();
in.close();
out.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return false;
}
}

private void closeconnect() {
try {
tc.disconnect();
in.close();
//out.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}

private String printresponse() {
try {
byte[] buff = new byte[1024];
int ret_read = 0;
do {
ret_read = in.read(buff);
String a = new String(buff, 0, ret_read);
System.out.print("=" + a);
if (a.endsWith(":") | a.endsWith(">") | a.endsWith("]")) {
System.out.print(a);
return null;
}

} while (ret_read >= 0);
} catch (Exception e) {
System.err.println("Exception while reading socket:"
+ e.getMessage());
}

try {
tc.disconnect();
} catch (Exception e) {
System.err.println("Exception while closing telnet:"
+ e.getMessage());
}
return null;
}

private String printresponse2() {
try {
byte[] buff = new byte[1024];
int ret_read = 0;
ret_read = in.read(buff);
while (ret_read >= 0) {
String a = new String(buff, 0, ret_read);
a = a.trim();
System.out.print("=" + a);
if (a.endsWith(":") | a.endsWith(">") | a.endsWith("]")) {
System.out.print(a);
return null;
}
}
} catch (Exception e) {
System.err.println("Exception while reading socket:"
+ e.getMessage());
}

try {
tc.disconnect();
} catch (Exception e) {
System.err.println("Exception while closing telnet:"
+ e.getMessage());
}
return null;
}

}

可以连接成功
[5;1H[K[6;1H[K[7;1H[K[8;1H[K[9;1H[K[10;1H[K[11;1H[K[12;1H[K[13;1H[K[14;1H[K[15;1H[K[16;1H[K[17;1H[K[18;1H[K[19;1H[K[20;1H[K
谁该看下