Jsch：命令输出不可用

Question

我想用jsch连接到远程交换机并运行一些命令并提取输出。

我能够使用连接到交换机，但命令输出在输入流中不可用。也许我没有按照正确的方式去做。这里的代码

session = jsch.getSession("user", "10.0.0.0", 22); 
    session.setPassword("somepwd"); 
    session.setConfig("StrictHostKeyChecking", "no"); 
    session.connect(); 
    System.out.println("connected to remote host"); 
    Channel channel = session.openChannel("shell"); 

    OutputStream ops = channel.getOutputStream(); 
    PrintStream ps = new PrintStream(ops); 
     channel.connect(); 
      ps.println("show version"); 
      ps.flush(); 
      ps.close(); 
      InputStream in=channel.getInputStream(); 
      byte[] bt=new byte[1024]; 


      while(in.available()>0) 
      { 
       int i=in.read(bt, 0, 1024); 
       if(i<0) 
       break; 
        String str=new String(bt, 0, i); 
       //displays the output of the command executed. 
        System.out.print(str); 
      } 

    channel.disconnect(); 
    session.disconnect(); 

当我调试inputStream.isAvailable（）总是返回零暗示没有输出命令。

TIA！

Answer 1

请尝试下面的代码 - 测试和工作

Channel channel = session.openChannel("shell"); 
    OutputStream ops = channel.getOutputStream(); 
    PrintStream ps = new PrintStream(ops); 
    channel.connect(); 
    ps.println("pwd"); 
    ps.println("exit"); 
    ps.flush(); 
    ps.close(); 

    InputStream in = channel.getInputStream(); 
    BufferedReader reader = new BufferedReader(new InputStreamReader(in)); 
    System.out.println("Opening..."); 

    String jarOutput; 
    while ((jarOutput = reader.readLine()) != null) 
     System.out.println(jarOutput); 
    reader.close(); 
    channel.disconnect(); 

输出 -

开幕...
用户@主持人：〜> PWD
/home/user中
用户@host：〜>
user @ host：〜> exit
注销