Java通过Telnet连接执行shell脚本 【转】

 

/**
 * 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();
    }
    }
}