Question

我正在寻找一个简单的例子如何在Jsch中使用Expect4j（使用Shell而不是exec）我的意思是如何向服务器发送命令（~8），以及如何打印响应。

到目前为止，我有这个：

  JSch jsch=new JSch();
  String host="www.superserver.uk.com";
  String user="tom1234";
  String passwd="12345a";
  Session session=jsch.getSession(user, host, 22);
  session.setPassword(passwd);
  session.setConfig("StrictHostKeyChecking", "no"); // if yes nothing works, but we're secure!
  session.connect();  
  Channel channel=session.openChannel("shell");//only shell 
  channel.setInputStream(System.in);// enter lrp_list
  channel.setOutputStream(System.out);

我想发送如下命令：command =（“lrp_list; newgrp xxx; date”）;发送（命令）; 还有一些我发现只有时间限制的例子;而且我需要像上面代码那样的东西，即使执行需要15分钟也会超出命令。

Answer 1

设置SCPInfo对象以保存用户名，密码，端口：22和ip。

    List<String> commands = new ArrayList<String>();
    commands.add("touch test1.txt");
    commands.add("touch test2.txt");
    commands.add("touch test3.txt");
    runCommands(scpInfo, commands);

public static void runCommands(SCPInfo scpInfo, List<String> commands){
    try {
        JSch jsch = new JSch();
        Session session = jsch.getSession(scpInfo.getUsername(), scpInfo.getIP(), scpInfo.getPort());
        session.setPassword(scpInfo.getPassword());
        setUpHostKey(session);
        session.connect();

        Channel channel=session.openChannel("shell");//only shell  
        channel.setOutputStream(System.out); 
        PrintStream shellStream = new PrintStream(channel.getOutputStream());  // printStream for convenience 
        channel.connect(); 
        for(String command: commands) {
            shellStream.println(command); 
            shellStream.flush();
        }

        Thread.sleep(5000);

        channel.disconnect();
        session.disconnect();
    } catch (Exception e) { 
        System.err.println("ERROR: Connecting via shell to "+scpInfo.getIP());
        e.printStackTrace();
    }
}

private static void setUpHostKey(Session session) {
    // Note: There are two options to connect
    // 1: Set StrictHostKeyChecking to no
    //    Create a Properties Object
    //    Set StrictHostKeyChecking to no
    //    session.setConfig(config);
    // 2: Use the KnownHosts File
    //    Manually ssh into the appropriate machines via unix
    //    Go into the .ssh\known_hosts file and grab the entries for the hosts
    //    Add the entries to a known_hosts file
    //    jsch.setKnownHosts(khfile);
    java.util.Properties config = new java.util.Properties();
    config.put("StrictHostKeyChecking", "no");
    session.setConfig(config);
}

Answer 2

您拥有的代码将Shell的Inputstream / outputStream连接到本地java进程的相同流。为了在shell中执行命令，你必须在shell的输入流中提交这些命令（即不将它连接到本地输入），如下所示：

JSch jsch=new JSch();
String host="www.superserver.uk.com";
String user="tom1234";
String passwd="12345a";
Session session=jsch.getSession(user, host, 22);
session.setPassword(passwd);
session.setConfig("StrictHostKeyChecking", "no"); // if yes nothing works, but we're secure!
session.connect();  
Channel channel=session.openChannel("shell");//only shell 
channel.setOutputStream(System.out);
PrintStream shellStream = new PrintStream(channel.getOutputStream());  // printStream for convenience
channel.connect();
shellStream.println("lrp_list");
shellStream.println("newgrp xxx");
shellStream.println("date");

然后等到“date”的结果到来，然后关闭频道。（您可能希望先发送“退出”或“退出”。）

我不知道expect4j，但我假设你可以提供一对InputStream和OutputStream - 然后在这里使用getInputStream代替setOutputStream。

好的，找到了source for Expect4j.java后，我会这样做：

JSch jsch=new JSch();
String host="www.superserver.uk.com";
String user="tom1234";
String passwd="12345a";
Session session=jsch.getSession(user, host, 22);
session.setPassword(passwd);
session.setConfig("StrictHostKeyChecking", "no"); // if yes nothing works, but we're secure!
session.connect();  
Channel channel=session.openChannel("shell");//only shell 
Expect4j expect = new Expect4j(channel.getInputStream(), channel.getOutputStream());
// use expect methods

Jsch shell / Expecdt4j简单的例子？

2 个答案: