jsch中ChannelShell与ChannelExec的区别及说明

        ChannelShell channel = (ChannelShell) session.openChannel("shell");
        channel.connect();
        InputStream inputStream = channel.getInputStream();
        OutputStream outputStream = channel.getOutputStream();
        String cmd = "ls \n\r";
        outputStream.write(cmd.getBytes());
        String cmd2 = "cd /home/jenkins/workspace/ggservice \n\r";
        outputStream.write(cmd2.getBytes());
        String cmd3 = "pwd \n\r";
        outputStream.write(cmd3.getBytes());
        outputStream.flush();
BufferedReader in = new BufferedReader(new InputStreamReader(inputStream));
        String msg = null;
        while((msg = in.readLine())!=null){
            System.out.println(msg);
        }
        in.close();

BufferedReader in = new BufferedReader(new InputStreamReader(inputStream)); String msg = null;
while((msg = in.readLine())!=null){//当所有的命令都执行完毕后,就会产生阻塞
    System.out.println(msg);
}
in.close();

        InputStream inputStream = channel.getInputStream();//从远程端到达的所有数据都能从这个流中读取到
        OutputStream outputStream = channel.getOutputStream();//写入该流的所有数据都将发送到远程端。
        //使用PrintWriter流的目的就是为了使用println这个方法
        //好处就是不需要每次手动给字符串加\n
        PrintWriter printWriter = new PrintWriter(outputStream);
        String cmd = "ls";
        printWriter.println(cmd);
        String cmd2 = "cd /home/jenkins/workspace/ggservice";
        printWriter.println(cmd2);
        String cmd3 = "ls";
        printWriter.println(cmd3);
        printWriter.println("exit");//加上个就是为了，结束本次交互
        printWriter.flush();
BufferedReader in = new BufferedReader(new InputStreamReader(inputStream));
String msg = null;
        while((msg = in.readLine())!=null){
            System.out.println(msg);
        }
        in.close();

...代码省略 ...
ChannelShell channel = (ChannelShell) session.openChannel("shell");
channel.connect();
//从远程端到达的所有数据都能从这个流中读取到
InputStream in = channel.getInputStream();
//写入该流的所有数据都将发送到远程端。
OutputStream outputStream = channel.getOutputStream();
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;
  }
}