一个关于java telnet的批处理郁闷问题

程序功能目标：通过一个已经连接telnet 发送另外一条telnet 命令跳转到跳转到另外一个主机。（第一个支持telnet命令）
代码如下：
[code="java"]
package tmh.tvs.util.net.telnet;

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

import java.io.*;
import java.net.SocketException;
import java.util.StringTokenizer;

public class TmhTelnet implements Runnable, TelnetNotificationHandler {

private static TelnetClient tc = null;
private InputStream in;
private PrintStream out;
public static void main(String args[]){     
    Thread t = new Thread(new TmhTelnet("125.46.86.123",23,"*****","******"));
    t.start();
}
public TmhTelnet(String host, int port,String username,String password) {
    if(intconnect(host,port)){
        write(username);
        write(password);
        writescript("command.txt");
    }
}

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();
    }


}
private void write(String command) {
    try{
        System.out.println("command:>>>>>>>>>"+command);
        out.println(command);
        out.flush();            
    }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();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        return false;
    }       
}

public void receivedNegotiation(int negotiation_code, int option_code) {
    String command = null;
    if (negotiation_code == TelnetNotificationHandler.RECEIVED_DO) {
        command = "DO";
    } else if (negotiation_code == TelnetNotificationHandler.RECEIVED_DONT) {
        command = "DONT";
    } else if (negotiation_code == TelnetNotificationHandler.RECEIVED_WILL) {
        command = "WILL";
    } else if (negotiation_code == TelnetNotificationHandler.RECEIVED_WONT) {
        command = "WONT";
    }
    System.out.println("Received " + command + " for option code "
            + option_code);
}

/***************************************************************************
 * Reader thread. Reads lines from the TelnetClient and echoes them on the
 * screen.
 **************************************************************************/
public void run() {
    InputStream instr = tc.getInputStream();

    try {

        byte[] buff = new byte[1024];
        int ret_read = 0;
        do {
            ret_read = instr.read(buff);
            if (ret_read > 0) {
                System.out.print(new String(buff, 0, ret_read));
            }

        } 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());
    }
}

}

[/code]

输出结果：

command:>>>>>>>>>*****
command:>>>>>>>>>*******
command:>>>>>>>>>telnet 10.1.2.2
command:>>>>>>>>>******
command:>>>>>>>>>dis mac
command:>>>>>>>>>null

• Copyright (c) 2004-2007 Hangzhou H3C Tech. Co., Ltd. All rights reserved. *
• Without the owner's prior written consent, *
• no decompiling or reverse-engineering shall be allowed. * ********************************************************************************

Login authentication

Username:admin
Password:
telnet 10.1.2.2
Trying 10.1.2.2 ...
Press CTRL+K to abort
Connected to 10.1.2.2 ...password:在这里应该是向下走的可是不行（很不解）

问题：在使用键盘输入的时候可以跳转，但是使用批处理的时候只到了要求密码的地方。请各位给点建议。我用的apache的commons net 包

花了2个小时研究了一下telnet，学艺不精，复杂的就不会了，在你的基础上修改了一下，能跑，不过很不完善（因为你的程序很有问题，HOHO），如果command.txt最后一个命令不是exit,则需要自己结束JVM。初步估计你的程序没有等到提示符出来就把所有命令都输出了。
[code="java"]package tmh.tvs.util.net.telnet;
import org.apache.commons.net.telnet.*;

import java.io.*;

import java.net.SocketException;

import java.util.StringTokenizer;

public class TmhTelnet implements Runnable, TelnetNotificationHandler {

private static TelnetClient tc = null;   
private InputStream in;   
private PrintStream out;
private Thread tThread;
private boolean connected=true;
public static void main(String args[]){
    TmhTelnet telnet=new TmhTelnet ("125.46.86.123",23);
    telnet.tThread = new Thread(telnet);   
    telnet.tThread.start();

    telnet.write("******");   
    telnet.write("******");
    telnet.writescript("command.txt");   
}   
public TestTelnet(String host, int port) {   
    intconnect(host,port);
}   

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();   
                if(command!=null)write(command);   
            }   
        }   
    } catch (FileNotFoundException e) {   
        // TODO Auto-generated catch block   
        e.printStackTrace();   
    } catch (IOException e) {   
        // TODO Auto-generated catch block   
        e.printStackTrace();   
    }   


}   
private void write(String command) {   
    try{   
        System.out.println("command:>>>>>>>>>"+command);   
        out.println(command);
        out.flush();
        while(!tThread.getState().equals(Thread.State.BLOCKED));
    }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();   
        } catch (IOException e1) {   
            // TODO Auto-generated catch block   
            e1.printStackTrace();   
        }   
        return false;   
    }          
}   

public void receivedNegotiation(int negotiation_code, int option_code) {   
    String command = null;   
    if (negotiation_code == TelnetNotificationHandler.RECEIVED_DO) {   
        command = "DO";   
    } else if (negotiation_code == TelnetNotificationHandler.RECEIVED_DONT) {   
        command = "DONT";   
    } else if (negotiation_code == TelnetNotificationHandler.RECEIVED_WILL) {   
        command = "WILL";   
    } else if (negotiation_code == TelnetNotificationHandler.RECEIVED_WONT) {   
        command = "WONT";   
    }   
    System.out.println("Received " + command + " for option code "  
            + option_code);   
}   

/***************************************************************************  
 * Reader thread. Reads lines from the TelnetClient and echoes them on the  
 * screen.  
 **************************************************************************/  
public void run() {   
    InputStream instr = tc.getInputStream();   

    try {   

        byte[] buff = new byte[1024];   
        int ret_read = 0;   
        do {   
            ret_read = instr.read(buff);   
            if (ret_read > 0) {   
                System.out.print(new String(buff, 0, ret_read));   
            }   
        } 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());   
    }   
}   

} [/code]