public static void main(String[] args)throws Exception {

        ScriptEngine se = new ScriptEngineManager().getEngineByName("javascript");

        Bindings p = se.createBindings();

        p.put("factor", 3);

        se.setBindings(p, ScriptContext.ENGINE_SCOPE);

        Scanner sc = new Scanner(System.in);

        while (sc.hasNextInt()) {

            int each = sc.nextInt();

            int each2 =sc.nextInt();

            se.eval(new FileReader(new File("D:/_TMP/_tmp.js")));

            if (se instanceof Invocable) {

                Invocable invocable = (Invocable)se;

                double result = (double)invocable.invokeFunction("calc",each,each2);

                System.out.println("执行js："+result);

            }

        }

    }

function calc(each,each2){

    return each + each2 * factor;

}