准备工作，远程windows机器中开启telnet服务，将远程登录用户添加至telnetClients用户组
核心代码:
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import org.apache.commons.net.telnet.TelnetClient;
import org.testng.annotations.Test;
/**
*
* @author zhuwei
*
*/
public class TelnetUtils {
/**
* 结束标识字符串,Windows中是>,Linux中是#
*/
private String prompt = ">";
/**
* 结束标识字符
*/
private char promptChar = ‘>‘;
/**
* TelnetClient对象
*/
private TelnetClient telnet;
/**
* InputStream 输入流,接收返回信息
*/
private InputStream in;
/**
* PrintStream 向服务器写入 命令
*/
private PrintStream out;
/**
* 构造函数
* @param termtype
* @param prompt
*/
public TelnetUtils(String termtype,String prompt){
this.telnet = new TelnetClient(termtype);
setPrompt(prompt);
}
/**
* 构造函数
* @param termtype
*/
public TelnetUtils(String termtype){
this.telnet = new TelnetClient(termtype);
}
/**
* 构造函数
*/
public TelnetUtils(){
telnet = new TelnetClient();
}
/**
* 登录到目标主机
* @param ip Ip地址
* @param port 端口号
* @param username 用户名
* @param password 密码
*/
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 String
*/
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();
}
}
} 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();
}
}
/**
*
*功能说明:发送命令,返回执行结果
*
*输入参数:command telnet命令
*
*输出参数:String 命令执行结果
* @throws UnsupportedEncodingException
*
*
*/
public String sendCommand(String command) throws UnsupportedEncodingException {
try {
write(command);
//return readUntil(prompt);
} catch (Exception e) {
e.printStackTrace();
}
//将返回结果转码为gbk,否则会乱码
String serverResult = new String(readUntil(prompt).getBytes("ISO-8859-1"),"GBK") ;
return serverResult;
}
/**
*功能说明:关闭telnet连接
*
*输入参数:
*
*输出参数:
*/
public void distinct(){
try {
if(telnet!=null&&!telnet.isConnected())
telnet.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
*功能说明:设置结束标识符
*
*输入参数:prompt 结束标识符
*
*输出参数:
*
*/
public void setPrompt(String prompt) {
if(prompt!=null){
this.prompt = prompt;
this.promptChar = prompt.charAt(prompt.length()-1);
}
}
/**
*功能说明:测试函数
*
*输入参数:args
*
*输出参数:
* @throws UnsupportedEncodingException
*/
public String excuteWinCmd(String remoteHost,String port,String userName,String passWord,String winCmd) throws UnsupportedEncodingException{
login(remoteHost, Integer.valueOf(port), userName, passWord);
String serverResult = sendCommand(winCmd);
distinct();
return serverResult;
}
@Test
public void test1() throws UnsupportedEncodingException{
//Windows,用VT220,否则会乱码
TelnetUtils telnetUtils = new TelnetUtils("VT220",">");
String result = telnetUtils.excuteWinCmd("172.19.21.216", "23", "xxxx", "xxxx","taskkill /f /t /IM chrome.exe");
System.out.println(result);
}
}
原文地址：https://www.cnblogs.com/zw520ly/p/8889600.html