利用Ganymed SSH-2模拟SSH操作

官方地址：http://www.cleondris.ch/opensource/ssh2/

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.junit.Test;
import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.Session;
import ch.ethz.ssh2.StreamGobbler;
public class TestSSH{
 @Test
        public void testSsh() {
   String hostname = "192.168.88.128";  
         String username = "root";  
         String password = "a150321927";
                try {
                        /* Create a connection instance */
                        Connection conn = new Connection(hostname);// 首先构造一个连接器，传入一个需要登陆的ip地址
                        /* Now connect */
                        conn.connect();
                        System.out.println("connect ok");
                        /*
                         * Authenticate. If you get an IOException saying something like
                         * "Authentication method password not supported by the server at this stage."
                         * then please check the FAQ.
                         */
                        //模拟登陆目的服务器 传入用户名和密码 ，
                        //它会返回一个布尔值，true 代表成功登陆目的服务器，否则登陆失败
                        boolean isAuthenticated = conn.authenticateWithPassword(username,password);
                        if (isAuthenticated == false)
                                throw new IOException("Authentication failed.");
                        System.out.println("Authentication ok");
                        /* Create a session */
                        Session sess = conn.openSession();
                        sess.execCommand("uname -a");//执行linux命令
                        System.out.println("Here is some information about the remote host:");
                        /*
                         * This basic example does not handle stderr, which is sometimes
                         * dangerous (please read the FAQ).
                         *接收目标服务器上的控制台返回结果，读取br中的内容
                         */
                        InputStream stdout = new StreamGobbler(sess.getStdout());
                        BufferedReader br = new BufferedReader(new InputStreamReader(stdout));
                        while (true) {
                                String line = br.readLine();
                                if (line == null)
                                        break;
                                System.out.println(line);
                        }
                        /* Show exit status, if available (otherwise "null") 得到脚本运行成功与否的标志 ：0－成功 非0－失败*/
                        System.out.println("ExitCode: " + sess.getExitStatus());
                        /* Close this session */
                        sess.close();
                        /* Close the connection */
                        conn.close();
                } catch (IOException e) {
                        e.printStackTrace(System.err);
                        System.exit(2);
                }
        }
}

运行结果：

connect ok
Authentication ok
Here is some information about the remote host:
Linux localhost.localdomain 2.6.9-78.ELsmp #1 SMP Wed Jul 9 15:39:47 EDT 2008 i686 i686 i386 GNU/Linux
ExitCode: 0

总结使用步骤：

 

1. 首先构造一个连接器，传入一个需要登陆的ip地址

Connection conn = new Connection(hostname);

2. 模拟登陆目的服务器传入用户名和密码，

boolean isAuthenticated = conn.authenticateWithPassword(username, password);它会返回一个布尔值，true代表成功登陆目的服务器，否则登陆失败

3. 打开一个session，有点象Hibernate的session，执行你需要的linux 脚本命令 。

Session sess = conn.openSession();

sess.execCommand("last");

4.接收目标服务器上的控制台返回结果，读取br中的内容

InputStream stdout = new StreamGobbler(sess.getStdout());

BufferedReader br = new BufferedReader(new InputStreamReader(stdout));

5.得到脚本运行成功与否的标志：0－成功非0－失败

System.out.println("ExitCode: " + sess.getExitStatus());

6.关闭session和connection

 sess.close();

 conn.close();

 

 

注意的地方：如果你需要执行多个linux控制台脚本，比如第一个脚本的返回结果是第二个脚本的入参，你必须打开多个Session,也就是多次调用

Session sess = conn.openSession();,使用完毕记得关闭就可以了