The shell can’t be used at all. It’s hard to find such an ssh library, but the documentation is so rubbish and there are no cases.

This is all the methods I have tried. I just want to interactively enter a string after I execute the command, and then the script I execute prints out the result of my input, but without exception, all are blocked and cannot be run at all. I looked through the issues madly, and couldn't even find a way to use the shell. There is only exec in the demo. After I execute exec, the executed script needs to read my input. How can I input it again? I can write using outputstream. After writing, I have to read the output of the script again, which he can’t do, or say I can't find any way to read it. As long as I try to read it, it will always be blocked, stuck forever, and never finish running.
```
String host = "localhost";
int port = 23;
String username = "tablo";
String password = "236375";
String cmd = "sh cmd.sh";
DefaultTerminal build = DefaultTerminal.builder()
.host(host)
.port(port)
.password(password)
.username(username)
.build();
// ShellResult shellResult = SSH2ClientUtil.writeExec(cmd,() ->"777",build);
SSHClient client = SSH2ClientUtil.getClient(build);
Session session = client.startSession();
session.allocateDefaultPTY();
Session.Command exec = session.exec(cmd);
OutputStream outputStream = exec.getOutputStream();
outputStream.write("777".getBytes(StandardCharsets.UTF_8));
outputStream.flush();
exec.join();
System.out.println(new String(exec.getInputStream().readAllBytes()));
// OutputStream outputStream = exec.getOutputStream();
// outputStream.write("777".getBytes(StandardCharsets.UTF_8));

// outputStream.flush();

//// Session.Command exec = client.startSession().exec(cmd);
// Session.Shell shell = session.startShell();
// OutputStream output = shell.getOutputStream();
// output.write("ls".getBytes(StandardCharsets.UTF_8));
// output.flush();
// InputStream inputStream = shell.getInputStream();
// System.out.println(new String(inputStream.readAllBytes()));
// inputStream.close();
// OutputStream outputStream = shell.getOutputStream();
// outputStream.write("878".getBytes(StandardCharsets.UTF_8));
// outputStream.flush();
// InputStream stream = shell.getInputStream();
// System.out.println(new String(stream.readAllBytes()));
// shell.close();
// Expect expect = new ExpectBuilder()
// .withOutput(shell.getOutputStream())
// .withInputs(shell.getInputStream(), shell.getErrorStream())
// .withInputFilters(Filters.removeColors(), Filters.removeNonPrintable())
// .withExceptionOnFailure()
// .build();
// try {
// expect.sendLine(cmd);
// expect.sendLine("777");
//
// System.out.println(expect.expect(Matchers.anyString()).getBefore());
// System.out.println(expect.expect(times(2,contains("\n"))).getResults().get(0).getBefore());
//// System.out.println(expect.expect(Matchers.regexp("[\\s\\S]*")).getInput());
//// expect.expect(contains("(Y/N)"));
//// expect.send("N");
//// expect.expect(Matchers.regexp(": $"));
//// expect.send("\b");
//// expect.expect(Matchers.regexp("\\(y\\/n\\)"));
//// expect.sendLine("y");
//// expect.expect(contains("Would you like to sign the guestbook?"));
//// expect.send("n");
//// expect.expect(contains("[RETURN]"));
//// expect.sendLine();
// } finally {
// expect.close();
// session.close();
// }

```