如何使用Java11在远程计算机中创建文件/目录

您可以使用以下代码来获取进程退出代码和错误消息：

public class SshDirMaker {
    public static void main(String[] args) throws IOException, InterruptedException {
        String hostname = "host";
        String mdbDir = "/mydir";

        Process process = Runtime.getRuntime().exec("ssh root@" + hostname + " 'mkdir -p " + mdbDir + "'");
        process.waitFor();
        System.out.println("exit code " + process.exitValue());
        System.out.println("error message" + readInputStreamAsString(process.getErrorStream()));
    }

    private static String readInputStreamAsString(InputStream in) throws IOException {
        BufferedInputStream bis = new BufferedInputStream(in);
        ByteArrayOutputStream buf = new ByteArrayOutputStream();
        int result = bis.read();
        while (result != -1) {
            byte b = (byte) result;
            buf.write(b);
            result = bis.read();
        }
        return buf.toString();
    }
}

.waitFor()如果需要等待进程终止，则应使用。