急求java实现telnet登陆全过程的源码

Question

参考  http://www.javaeye.com/problems/957

Answer 1

很简单，你知道知道telnet的协议就行了，很简单。然后UDP。

Answer 2

楼主的代码不是同这个吗？http://topic.csdn.net/t/20050606/15/4062913.html

Answer 3

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

谁该看下

Answer 4

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！