java如何通过cmd运行phantomjs

我的phantomjs.exe 在D盘/phantomjs/bin下,现在我要在java里面通过Runtime.getRuntime().exec()来运行这个命令:
phantomjs highcharts-convert.js -host 127.0.0.1 -port 3003
String cmd = "这里改如何写呢";

 String cmd = "";
 Runtime runtime = Runtime.getRuntime();
 runtime.exec(cmd)
  public static void main(String[] args) {
        try

        {

            Process process = Runtime.getRuntime().exec ("ls");

            InputStreamReader ir=new InputStreamReader(process.getInputStream());

            LineNumberReader input = new LineNumberReader(ir);

            String line;

            while ((line = input.readLine ()) != null)

                System.out.println(line);

        }

        catch (java.io.IOException e){

            System.err.println ("IOException " + e.getMessage());

        }
    }

这是一个执行ls命令的例子,你在你自己机子上执行一下 你就明白了