/**

     * 通过请求头判断是否是微信内置浏览器，是否是在微信内打开

     * @param request

     * @return

     */

    @RequestMapping(value = "/hello")

    public String hello(HttpServletRequest request){

        String ua = request.getHeader("user-agent")

                .toLowerCase();

        if (ua.indexOf("micromessenger") <= 0){

            return "不是微信内置浏览器";

        }

        return "微信内置浏览器";

    }