使用j2ssh执行多个命令

时间:2012-12-06 11:13:47

标签: command j2ssh

我想知道如何使用j2ssh执行多个命令。我从网上得到的代码如下:

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;

import com.sshtools.j2ssh.io.IOStreamConnector;
import com.sshtools.j2ssh.io.IOStreamConnectorState;
import com.sshtools.j2ssh.connection.*;

import com.sshtools.j2ssh.SshClient;

import com.sshtools.j2ssh.authentication.PasswordAuthenticationClient;
import com.sshtools.j2ssh.authentication.AuthenticationProtocolState;
import com.sshtools.j2ssh.session.SessionChannelClient;

import com.sshtools.j2ssh.configuration.SshConnectionProperties;

import com.sshtools.j2ssh.transport.ConsoleHostKeyVerification;

public class MySSHClient {

  SshClient ssh = null;
  SshConnectionProperties properties = null;
  SessionChannelClient session = null;

  public MySSHClient(String hostName, String userName, String passwd )
  {

    try
    {
      // Make a client connection
      ssh = new SshClient();
      properties = new SshConnectionProperties();
      properties.setHost(hostName);

      // Connect to the host
      ssh.connect(properties, new ConsoleHostKeyVerification());

      // Create a password authentication instance
      PasswordAuthenticationClient pwd = new PasswordAuthenticationClient();

      pwd.setUsername(userName);
      pwd.setPassword(passwd);

      // Try the authentication
      int result = ssh.authenticate(pwd);

      // Evaluate the result
      if (result==AuthenticationProtocolState.COMPLETE) {

        System.out.println("Connection Authenticated");
      }
    }
    catch(Exception e)
    {
      System.out.println("Exception : " + e.getMessage());
    }

  }//end of method.


  public String execCmd(String cmd)
  {
    String theOutput = "";
    try
    {
      // The connection is authenticated we can now do some real work!
      session = ssh.openSessionChannel();

      if ( session.executeCommand(cmd) )
      {
        IOStreamConnector output = new IOStreamConnector();
        java.io.ByteArrayOutputStream bos =  new
        java.io.ByteArrayOutputStream();
        output.connect(session.getInputStream(), bos );
        session.getState().waitForState(ChannelState.CHANNEL_CLOSED);
        theOutput = bos.toString();
      }
      //else
      //throw Exception("Failed to execute command : " + cmd);
      //System.out.println("Failed to execute command : " + cmd);
    }
    catch(Exception e)
    {
      System.out.println("Exception : " + e.getMessage());
    }

    return theOutput;
  }


}

我试图转到目录,然后使用ls命令列出文件,但它不起作用

MySSHClient sshc = new MySSHClient(<hostName>, <userName>, <passwd>);
System.out.println( sshc.execCmd("cd test") );
System.out.println( sshc.execCmd("ls") );

请帮忙吗?

3 个答案:

答案 0 :(得分:0)

尝试用分号分隔命令。例如:System.out.println( sshc.execCmd("cd test; ls") );

答案 1 :(得分:0)

在命令之间添加运算符(&&):

System.out.println( sshc.execCmd("cd test && ls") );

&&优于;,因为如果cd失败,则ls不会被执行。

答案 2 :(得分:0)

不要使用executeCommand,而是尝试在输出流中编写命令 - session.getOutputStream(),最后添加'\n'。 然后读取输入流。

例如:

session.getOutputStream().write((command + "\n").getBytes());