Java通过Telnet连接执行shell脚本

/**
 * commons-net-2.0.jar是工程依赖包 
 */
package telnet2;

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

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

/**
 * @descript NetTelenet.java
 * @author sinclair
 * @date Jun 10, 2010
 */
public class NetTelnet {
    private TelnetClient telnet = new TelnetClient();
    private InputStream in;
    private PrintStream out;
    private char prompt = '$';// 普通用户结束

    public NetTelnet( 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:" );
	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();
	    }
	} 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 ) {
	try {
	    System.out.println( "启动Telnet..." );
	    String ip = "192.168.0.11";
	    int port = 23;
	    String user = "user";
	    String password = "111111";
	    NetTelnet telnet = new NetTelnet( ip, port, user, password );
	    telnet.sendCommand( "export LANG=en" );
	    String r1 = telnet.sendCommand( "cd /home/project/" );
	    String r2 = telnet.sendCommand( "pwd" );
	    String r3 = telnet.sendCommand( "sh a.sh" );

	    System.out.println( "显示结果" );
	    System.out.println( r1 );
	    System.out.println( r2 );
	    System.out.println( r3 );

	    telnet.disconnect();
	} catch ( Exception e ) {
	    e.printStackTrace();
	}
    }
}