public static String runNetstat() {
        try {
            ProcessBuilder p = new ProcessBuilder("netstat.exe", "-noa", "-p", "tcp");
            Process netstat = p.start();

            java.io.BufferedReader input = new java.io.BufferedReader(new java.io.InputStreamReader(netstat.getInputStream(), "GBK"));

            StringBuilder result = new StringBuilder();
            String line = null;
            while ((line = input.readLine()) != null) {
                result.append(line).append("\n");
            }

            input.close();
            netstat.destroy();
            return result.toString();
        } catch (Exception e) {
            return e.getMessage();
        }
    }