public static void main(String[] args) {

        ScriptEngineManager manager = new ScriptEngineManager();

        ScriptEngine engine = manager.getEngineByName("nashorn");

        try {

            int value=2;

            SimpleBindings bind=new SimpleBindings();

            SimpleBindings bind2=new SimpleBindings();

            SimpleBindings bind3=new SimpleBindings();

            bind.put("点数", value);

            bind2.put("a", value);

            bind2.put("b", value);

            bind3.put("a1", value+1);

            bind3.put("b1", value+2);

             System.out.println(engine.eval("点数<50?50:Math.ceil(56/50)*50",bind));

            System.out.println(engine.eval("demosum=function(a,b){return a+b}; demosum(a,b);",bind2));    // 定义方法，并调用支持参数绑定

            System.out.println(engine.eval("(function(a1,b1){function demosub(a,b){ return a+b;}return demosub(a1,b1)})(a1,b1)",bind3));    // 使用js 立即执行函数

          } catch (ScriptException e) {

            e.printStackTrace();

        }

    }