java调js基础

    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;
}