java telnet协议_Java调用Telnet示例

落日映苍穹つ 2022-11-03 11:37 249阅读 0赞

\[java\] view plaincopy

import java.io.IOException;

import java.io.InputStream;

import java.io.PrintStream;

import java.io.UnsupportedEncodingException;

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

/\*\*

\* Telnet操作器,基于commons-net-2.2.jar

\* @author JiangKunpeng

\*/

public class TelnetOperator \{

private String prompt = ">"; //结束标识字符串,Windows中是>,Linux中是\#

private char promptChar = '>';   //结束标识字符

private TelnetClient telnet;

private InputStream in;     // 输入流,接收返回信息

private PrintStream out;    // 向服务器写入 命令

/\*\*

\* @param termtype  协议类型：VT100、VT52、VT220、VTNT、ANSI

\* @param prompt    结果结束标识

\*/

public TelnetOperator(String termtype,String prompt)\{

telnet = new TelnetClient(termtype);

setPrompt(prompt);

public TelnetOperator(String termtype)\{

telnet = new TelnetClient(termtype);

public TelnetOperator()\{

telnet = new TelnetClient();

/\*\*

\* 登录到目标主机

\* @param ip

\* @param port

\* @param username

\* @param password

\*/

public void login(String ip, int port, String username, String password)\{

try \{

telnet.connect(ip, port);

in = telnet.getInputStream();

out = new PrintStream(telnet.getOutputStream());

readUntil("login:");

write(username);

readUntil("password:");

write(password);

String rs = readUntil(null);

if(rs!=null&&rs.contains("Login Failed"))\{

throw new RuntimeException("登录失败");

\} catch (Exception e) \{

throw new RuntimeException(e);

/\*\*

\* 读取分析结果

\* @param pattern   匹配到该字符串时返回结果

\* @return

\*/

public String readUntil(String pattern) \{

StringBuffer sb = new StringBuffer();

try \{

char lastChar = (char)-1;

boolean flag = pattern!=null&&pattern.length()>0;

if(flag)

lastChar = pattern.charAt(pattern.length() - 1);

char ch;

int code = -1;

while ((code = in.read()) != -1) \{

ch = (char)code;

sb.append(ch);

//匹配到结束标识时返回结果

if (flag) \{

if (ch == lastChar && sb.toString().endsWith(pattern)) \{

return sb.toString();

\}else\{

//如果没指定结束标识,匹配到默认结束标识字符时返回结果

if(ch == promptChar)

return sb.toString();

//登录失败时返回结果

if(sb.toString().contains("Login Failed"))\{

return sb.toString();

\}  灵域www.uy0.net

\} catch (Exception e) \{

e.printStackTrace();

return sb.toString();

/\*\*

\* 发送命令

\* @param value

\*/

public void write(String value) \{

try \{

out.println(value);

out.flush();

\} catch (Exception e) \{

e.printStackTrace();

/\*\*

\* 发送命令,返回执行结果

\* @param command

\* @return

\*/

public String sendCommand(String command) \{

try \{

write(command);

return readUntil(prompt);

\} catch (Exception e) \{

e.printStackTrace();

return null;

/\*\*

\* 关闭连接

\*/

public void distinct()\{

try \{

if(telnet!=null&&!telnet.isConnected())

telnet.disconnect();

\} catch (IOException e) \{

e.printStackTrace();

public void setPrompt(String prompt) \{

if(prompt!=null)\{

this.prompt = prompt;

this.promptChar = prompt.charAt(prompt.length()-1);

public static void main(String\[\] args) \{

TelnetOperator telnet = new TelnetOperator("VT220",">"); //Windows,用VT220,否则会乱码

telnet.login("192.168.2.19", 23, "administrator", "123456");

String rs = telnet.sendCommand("ipconfig");

try \{

rs = new String(rs.getBytes("ISO-8859-1"),"GBK");   //转一下编码

\} catch (UnsupportedEncodingException e) \{

e.printStackTrace();

System.out.println(rs);

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java telnet协议_Java调用Telnet示例

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