使用和JSch通过SSH连接到交换机

Question

我正在尝试使用API​​ JSch编写用于将SSH连接到Switch Alcatel-Lucent 7210 SAS-X并发送一些命令和接收输出的脚本。但不幸的是，它不适用于连接类型«exec» - 退出状态-1 当我使用连接类型«shell»与输入/输出思想控制台一切正常。 有人能帮助我吗？ 下面是我的脚本。

import com.jcraft.jsch.*;
import java.io.IOException;
import java.io.InputStream;
import java.util.Hashtable;

public class SSHTunel2 {
public static void main(String[] args) {

    String IPaddress_server="X.X.X.X";
    String User_server="admin";
    int Port_server=22;
    String Password_server="1111111";
    String Switch_command ="show version";
           try {
        JSch jsch = new JSch();
        // Connection to the Server
        Session session1=jsch.getSession(User_server, IPaddress_server);
        session1.setPassword(Password_server);
       Hashtable<String, String> config = new Hashtable<String, String>();
        config.put("StrictHostKeyChecking", "no");
        session1.setConfig(config);
        session1.connect();           

     System.out.println("session1.getServerVersion():"
                              +session1.getServerVersion();
     System.out.println("The session has been established to   
            +User_server+"@"+IPaddress_server);

        //Command execution
        Channel channel=session1.openChannel("exec");
        ((ChannelExec)channel).setCommand(Switch_command);
        channel.setInputStream(null);
        InputStream in=channel.getInputStream();
        channel.connect();

        //            Channel channel=session1.openChannel("shell");
        //            channel.setInputStream(System.in);
        //            channel.setOutputStream(System.out);
        //            channel.connect();

        byte[] tmp=new byte[1024];
        while(true){
            while(in.available()>0){
                int i=in.read(tmp, 0, 1024);
                if(i<0)break;
                System.out.print(new String(tmp, 0, i));
            }
            if(channel.isClosed()){
                if(in.available()>0) continue;
                System.out.println("exit-status:       
                                     "+channel.getExitStatus());
                break;
            }
            try{Thread.sleep(1000);}catch(Exception ee){}
        }

        channel.disconnect();
        session1.disconnect();

    } catch (JSchException e) {
        e.printStackTrace();

    }
    catch (IOException e) {
        e.printStackTrace();
    }
}

}

 /* Output */
session1.getServerVersion(): SSH-2.0-OpenSSH_3.5p1
The session has been established to admin@10.44.93.106
in.available(): 0
exit-status: -1

 Process finished with exit code 0