求一个java版本telnet客户端代码
求一个java版本telnet客户端代码
[解决办法]
一个简单的JAVA Telnet 客户端实现
commons-net-2.0.jar telnet功能的简单使用，
这个包实现了很多基本的基于Intenet协议，下面是 commons 支持的协议：
FTP/FTPS
NNTP
SMTP
POP3
Telnet
TFTP
Finger
Whois
rexec/rcmd/rlogin
Time (rdate) and Daytime
Echo
Discard
NTP/SNTP
下面简单写一个程序做telnet的测试，此程序仅作测试，所以很多写法并不规范。
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import org.apache.commons.net.telnet.TelnetClient;
public class CommonsTelnetTest {
private final String ip = ""; // 要telnet的IP地址
private final String port = "23"; //端口号，默认23
private final String user = "";//用户名
private final String pwd = ""; //用户密码
private final String osTag = "$";// 系统标示符号
private final TelnetClient tc = new TelnetClient(); //新建一个 TelnetClient对象，此对象是 commons-net-2.0.jar包提供
private InputStream in; // 输入流，接收返回信息
private PrintStream out; //像 服务器写入 命令
public void connect() {
try {
tc.connect(ip, Integer.parseInt(port));
in = tc.getInputStream();
out = new PrintStream(tc.getOutputStream());
} catch (Exception e) {
System.out.println("connect error !");
}
}
public String execute(String command) {
connect();
out.println(command);
out.flush();
StringBuffer sb = new StringBuffer();
try {
char ch = (char) in.read();
while (true) {
sb.append(ch);
if (ch == osTag.charAt(osTag.length() - 1)) {
if (sb.toString().endsWith(osTag))
return sb.toString();
}
ch = (char) in.read();
}
} catch (IOException e) {
e.printStackTrace();
}
return "error! when the program execute";
}
public static void main(String [] args){
System.out.println(new CommonsTelnetTest().execute("ls"));
}
}
[解决办法]
package com.hwtt.web.jsf.util;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.Socket;
import org.apache.commons.net.telnet.TelnetClient;
import org.eclipse.jdt.internal.compiler.ast.ThisReference;
public class Telnet {
//static final char LF = 10;
static final char LF = 10;
static final char CR = 13;
static final char DC1 = 17;
private String host="192.168.4.19";
private int port = 23;
private Socket socket= null;
private InputStream is=null;
private OutputStream os=null;
private DataInputStream sin=null;
private PrintStream sout=null;
private StringBuffer sb =new StringBuffer();
public Telnet()
{
}
public Telnet(String host,int port)
{
this.host =host;
this.port = port;
}
public int hand(InputStream is, OutputStream os) throws IOException {
while(true) {
int ch = is.read();
// System.out.println("Svr[ch]:" + ch);
if(ch==82)
{
System.out.println(ch);
}
if(ch < 0
[解决办法]
ch != 255)
return ch;
int cmd = is.read();
int opt = is.read();
//System.out.println("Svr[cmd&opt]:" + cmd+" : "+opt);
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) //子选项开始
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int svr = is.read();
while(svr != 240) {
baos.write(svr);
//System.out.println("Svr[while]:" + svr);
svr = is.read();
}
//System.out.println("Svr:" + baos.toString());
}
os.flush();
break;
default:
if (cmd == 253) {
os.write(255);
os.write(252);
os.write(opt);
os.flush();
//System.out.println("Svr[default]:" + opt);
}
}
}
}
public void pause(int cnt)
{
for(int i=0; i< cnt * 1000000; i++)
{
}
}
public void open(String userName,String password) throws IOException
{
socket = new Socket(this.host, this.port);
// System.out.println("client ok");
//获得对应socket的输入/输出流
is = socket.getInputStream();
os = socket.getOutputStream();
hand(is,os);
//输入用户名和密码
send(userName);
this.pause(1);
send(password);
System.out.println("open :------------1-------------- ");
System.out.println(receive());
System.out.println("open :------------1-end ------------- ");
//执行命令
String cmdStr = "ls -al";
send(cmdStr); //将读取得字符串传给server
System.out.println("open :------------2-------------- ");
System.out.println(receive());
System.out.println("open :------------2-end ------------- ");
//执行命令
cmdStr = "ps -ef";
send(cmdStr); //将读取得字符串传给server
System.out.println("open :------------3-------------- ");
System.out.println(receive());
System.out.println("open :------------3-end ------------- ");
//退出telnet
logOut();
}
/**
* Send data to the remote host.
* @param buf array of bytes to send
* @see #receive
*/
public void logOut() throws IOException {
//linux
// String cmdStr="logout"+CR+LF;
// send(cmdStr.getBytes());
//windows
String cmdStr="exit";
send(cmdStr);
}
public void send(String cmd) throws IOException {
String cmdStr = cmd+LF+CR;
os.write(cmdStr.getBytes());
os.flush();
}
public void send(byte b) throws IOException {
System.out.println("Connected to"+socket.getInetAddress()+":"+ socket.getPort());
os.write(b);
os.flush();
}
public String receive() throws IOException
{
String result="";
String temp=null;
this.pause(1);
for(int i=0; i< 2; i++)
{
temp = receiveData();
String des=new String(temp.getBytes(),"UTF-8");
result += des;
}
return result;
}
public String receiveData() throws IOException
{
StringBuffer sb =new StringBuffer();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
char[] buf = new char[1024];
int read = br.read(buf);
String temp=null;
temp = new String(buf,0,read);
//System.out.println("receiveData[while] : "+ temp+" :read: "+read);
sb.append(temp);
return sb.toString();
}
public void close() throws IOException
{
//关闭连接
if( sin != null ) sin.close(); //关闭数据输入流
if( sout != null ) sout.close(); //关闭数据输出流
if( is != null ) is.close(); //关闭数据输入流
if( os != null ) os.close(); //关闭数据输出流
if( socket != null )
{
socket.close(); //关闭socket
}
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
// TelnetClient tc = new TelnetClient();
Telnet telnet = new Telnet();
try
{
telnet.open("lb","123456");
//String str = telnet.receiveData();
//System.out.println("main : "+str);
telnet.close();
}
catch(IOException ie)
{
ie.printStackTrace();
try
{
telnet.close();
}
catch(IOException iec)
{
iec.printStackTrace();
}
}
}
}
[解决办法]
import java.net.*;
import java.io.*;
public class TelnetClient {
String host="162.105.31.222"; //Telnet服务器地址
int port=23; //端口号
public TelnetClient() {
System.out.println("Host " + host + "; port " + port);
try {
Socket socket = new Socket(host, port); //实例化套接字
new Listener(socket.getInputStream(), System.out).start(); //输出服务器信息到控制台
new Listener(System.in, socket.getOutputStream()).start(); //输出控制台信息到服务器
} catch(IOException ex) {
ex.printStackTrace(); //输出错误信息
return;
}
System.out.println("Connected Success");
}
class Listener extends Thread {
BufferedReader reader; //输入流
PrintStream ps; //输出流
Listener(InputStream is, OutputStream os) {
reader = new BufferedReader(new InputStreamReader(is)); //实例化输入流
ps = new PrintStream(os); //实例化输出流
}
public void run() {
String line;
try {
while ((line = reader.readLine()) != null) { //读取数据
ps.print(line); //输出数据
ps.print("\r\n");
ps.flush();
}
} catch(IOException ex) {
ex.printStackTrace();
}
}
}
public static void main(String[] argv) {
new TelnetClient();
}
}