每 30 分钟自动 Ping 外部服务器 [关闭]

Question

我在列表中有一组服务器。我想每 30 分钟 ping 一次这些服务器。我怎样才能做到这一点。这是一个带有 java 代码的 jsp 程序。

Answer 1

此代码将在每 30 分钟后执行一次，以 ping 给定的 ip

    public boolean ping(String ip) throws IOException, InterruptedException  extends TimerTask {
     public void run{       
     boolean isWindows = System.getProperty("os.name").toLowerCase().contains("win");

            ProcessBuilder processBuilder = new ProcessBuilder("ping", isWindows? "-n" : "-c", "1", ip`enter code here`);
            Process proc = processBuilder.start();
            BufferedReader in =
        new BufferedReader(
        new InputStreamReader(proc.getInputStream()));
        while (true) {
        String line = in.readLine();
        if (line == null)
        break;
        if(line.contains("Destination host unreachable")||line.contains("Request timed out")){

            return false;
            }
        }

            return true;
}

        }
// And From your main() method or any other method
Timer timer = new Timer();
 timer.schedule(new ping(ip), 0, (60*30*1000));