Shell for Telnet

package com.wz.test;import java.io.InputStream;import java.io.PrintStream;import org.apache.commons.net.telnet.TelnetClient;public class Shell {private TelnetClient telnet;private InputStream in;private PrintStream out;private char prompt = '$';private String pwdString;public Shell(String ip, int port, String user, String password, int timeout) throws Exception {telnet = new TelnetClient();telnet.setConnectTimeout(timeout);telnet.connect(ip, port);in = telnet.getInputStream();out = new PrintStream(telnet.getOutputStream());this.prompt = user.equals("root") ? '#' : '$';this.pwdString = "Password";login(user, password);}/** * 登录 * @Title login * @author Administrator * @param user * @param password * @return void */public void login(String user, String password) {readUntil("login:");write(user);readUntil(pwdString+":");write(password);readUntil(prompt + "");}/** * 读取分析结果 * @Title readUntil * @author Administrator * @param pattern * @return * @return String */public String readUntil(String pattern) {try {StringBuffer sb = new StringBuffer();char lastChar = pattern.charAt(pattern.length() - 1);char ch = (char) in.read();while (ch != -1) {sb.append(ch);if (ch == lastChar && sb.toString().endsWith(pattern)) {return sb.toString();}ch = (char) in.read();}} catch (Exception e) {e.printStackTrace();}return null;}/** * 写操作 * @Title write * @author Administrator * @param value */public void write(String value) {try {out.println(value);out.flush();} catch (Exception e) {e.printStackTrace();}}/** * 向目标发送命令 * @Title sendCommand * @author Administrator * @param command * @return * @return String */public String sendCommand(String command) {try {write(command);return readUntil(prompt + "");} catch (Exception e) {e.printStackTrace();}return null;}/** * 关闭连接 * @Title  disConnect  * @author  Administrator * @return  void */public void disConnect() {try {if(telnet != null) {            telnet.disconnect();              }} catch (Exception e) {e.printStackTrace();}}public static void main(String[] args) {System.out.println("启动Telnet...");String ip = "192.168.1.242";int port = 23;String user = "root";String password = "123456";int timeout = 5000;try {Shell telnet = new Shell(ip, port, user, password,timeout);//System.out.println(telnet.sendCommand("mysqldump -uroot -p123456 --verbose --databases erp > /home/wangzi/tmp/qq.sql"));String rs = telnet.sendCommand("ifconfig");System.out.println(new String(rs.getBytes("ISO-8859-1"),"GBK"));telnet.disConnect();} catch (Exception e) {System.out.println("连接失败，请确认ip地址、端口号、用户名、密码是否正确，同时确认目标主机是否开启Telnet...");}}}

commons-net