js 和 java互调

Java调JS

JDK1.8 中Nashorn 比JavaScript性能更好

　　public static void main(String[] args) {
        long s = System.currentTimeMillis();
        String a = "function d(a, b){ return a+b; } 
 d(1,2)";
        for (int i = 0; i < 100; i++) {
            System.out.println("JavaScript" + i +" : " + cal(a));
        }

        System.out.println("用时:" + (System.currentTimeMillis() -s ));
        s= System.currentTimeMillis();
        for (int i = 0; i < 100; i++) {
            System.out.println("Nashorn" + i +" : " + cal2(a));
        }
        System.out.println("用时:" + (System.currentTimeMillis() -s ));
    }

    private final static ScriptEngine jse = new ScriptEngineManager().getEngineByName("JavaScript");
    private final static ScriptEngine jse2 = new ScriptEngineManager().getEngineByName("nashorn");
    public static Object cal(String expression){
        try {
            return jse.eval(expression);
        } catch (ScriptException e) {
            e.printStackTrace();
        }
        return null;

    }
    public static Object cal2(String expression){
        try {
            return jse2.eval(expression);
        } catch (ScriptException e) {
            e.printStackTrace();
        }
        return null;
    }

https://blog.csdn.net/al_assad/article/details/60584351