Java实现telnet远程调用脚本

java中远程登陆主机并远程调用执行shell脚本

package place.in.javaeye;

import java.io.InputStream;
import java.io.PrintStream;

import org.apache.commons.net.telnet.TelnetClient;
public class Shell
{
    private TelnetClient telnet = new TelnetClient();

    private InputStream in;

    private PrintStream out;

    private char prompt = '$';// 普通用户结束

    public Shell(String ip, int port, String user, String password)
    {
        try
        {
            telnet.connect(ip, port);
            in = telnet.getInputStream();
            out = new PrintStream(telnet.getOutputStream());
            // 根据root用户设置结束符
            this.prompt = user.equals("root") ? '#' : '>';
            login(user, password);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    /**
     * 登录
     *
     * @param user
     * @param password
     */
    public void login(String user, String password)
    {
//        readUntil("login:");
    	readUntil("login:");
        write(user);
        readUntil("Password:");
        write(password);
        readUntil(prompt + "");
    }

    /**
     * 读取分析结果
     *
     * @param pattern
     * @return
     */
    public String readUntil(String pattern)
    {
        try
        {
            char lastChar = pattern.charAt(pattern.length() - 1);
            StringBuffer sb = new StringBuffer();
            char ch = (char)in.read();
            while (true)
            {
                sb.append(ch);
                if (ch == lastChar)
                {
                    if (sb.toString().endsWith(pattern))
                    {
                        return sb.toString();
                    }
                }
                ch = (char)in.read();
                System.out.print(ch);
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 写操作
     *
     * @param value
     */
    public void write(String value)
    {
        try
        {
            out.println(value);
            out.flush();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    /**
     * 向目标发送命令字符串
     *
     * @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 disconnect()
    {
        try
        {
            telnet.disconnect();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
    public static void main(String[] args) {
    	TelnetClient telnet = new TelnetClient();
    	try {
    		Shell she =new Shell("10.**.***.***", 23, "***", "***");
    		System.out.println(she);
    		System.out.println(she.sendCommand("ls"));
    		she.disconnect();

		}catch (Exception e) {
			// TODO: handle exception
		}

	}
}