微信公众号服务器配置token验证失败

@RequestMapping("tokenCheck")public void authServer(HttpServletRequest request, HttpServletResponse response) throws Exception{// 微信加密签名String signature = request.getParameter("signature");// 时间戳String timestamp = request.getParameter("timestamp");// 随机数String nonce = request.getParameter("nonce");// 随机字符串String echostr = request.getParameter("echostr");System.out.println("===========================");System.out.println(signature);System.out.println(timestamp);System.out.println(nonce);System.out.println(echostr);System.out.println("===========================");PrintWriter out = response.getWriter();// 通过检验signature对请求进行校验，若校验成功则原样返回echostr，表示接入成功，否则接入失败//if (SignUtil.checkSignature(signature, timestamp, nonce)) {out.print(echostr);//}out.close();out = null;}