Java 反射获取私有属性和方法

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //获取请求标识
        String methodName = request.getParameter("method");

        try {
            //获取调用者类的字节码对象
            Class clazz = this.getClass();

            //获取方法对象
            Method method = clazz.getDeclaredMethod(methodName, HttpServletRequest.class, 
            HttpServletResponse.class);
            method.setAccessible(true);// 将目标属性设置为可以访问
            //利用反射： 调用方法执行
            method.invoke(this, request, response);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }