Question

我有一个bash脚本，它使用sshpass和ssh自动登录到不同的机器和触发器命令。当从命令行触发时，bash脚本运行良好，但是当从java应用程序调用它时，它无法继续。

sshpass -p 'password' ssh user@XXX.XXX.XXX.XXX './SleepDisplay && exit'

bash脚本做了很多其他事情，我无法直接在java中实现ssh登录。我似乎无法弄明白，为什么它会失败。除了ssh之外的所有东西都运行良好。

Answer 1

首先打开shell并执行命令。尝试以下内容：

 String COMMAND = "sshpass -p 'password' ssh user@XXX.XXX.XXX.XXX './SleepDisplay && exit'";
 String[] SHELL_COMMAND = { "/bin/sh", "-c", COMMAND };
 ...
 Runtime runtime = Runtime.getRuntime();
 Process process = runtime.exec(SHELL_COMMAND);

希望我能给你一个有用的提示。

Answer 2

通过Runtime.exec()执行命令时，第一个元素是可执行文件，然后所有其他参数将在数组的其余部分单独传递。< / p>

但是你（可能）将整个linux 命令作为可执行文件传递，但这不起作用。

试试这个：

String[] cmdarray = {"sshpass", "-p", "'password'", "ssh", "user@XXX.XXX.XXX.XXX", "'./SleepDisplay && exit'"};
Runtime.getRuntime().exec(cmdarray);

Answer 3

您可以尝试使用ganymed-ssh2 java库，它可以让您使用java执行和执行shell脚本等等... 下面显示了使用此库的示例：

{
    String hostname = "127.0.0.1";
    String username = "joe";
    String password = "joespass";

    try
    {
        /* Create a connection instance */

        Connection conn = new Connection(hostname);

        /* Now connect */

        conn.connect();

        /* Authenticate.
         * If you get an IOException saying something like
         * "Authentication method password not supported by the server at this stage."
         * then please check the FAQ.
         */

        boolean isAuthenticated = conn.authenticateWithPassword(username, password);

        if (isAuthenticated == false)
            throw new IOException("Authentication failed.");

        /* Create a session */

        Session sess = conn.openSession();

                    // here execute which command separate for ";" 
        sess.execCommand("uname -a && date && uptime && who");

        System.out.println("Here is some information about the remote host:");

        /* 
         * This basic example does not handle stderr, which is sometimes dangerous
         * (please read the FAQ).
         */

        InputStream stdout = new StreamGobbler(sess.getStdout());

        BufferedReader br = new BufferedReader(new InputStreamReader(stdout));

        while (true)
        {
            String line = br.readLine();
            if (line == null)
                break;
            System.out.println(line);
        }

        /* Show exit status, if available (otherwise "null") */

        System.out.println("ExitCode: " + sess.getExitStatus());

        /* Close this session */

        sess.close();

        /* Close the connection */

        conn.close();

    }
    catch (IOException e)
    {
        e.printStackTrace(System.err);
        System.exit(2);
    }
}

使用带有bash的sshpass可以从命令行使用，而不是使用java exec

3 个答案: