Java：

 @ResponseBody
    @RequestMapping(value = "/wechat/jsApiTicket", method = RequestMethod.GET)
    public JsonResponse getJsApiTicket(HttpServletRequest request) {
        String jsapi_ticket= "HoagFKDcsGMVCIY2vOjf9kwlKC1UuXueXYiKtTHCeeFxK7VEtmGiR4nWiWC002Wx0JSUSz8kMcMJmpVg2Xbn_g";
       return JsonResponse.success(sign(jsapi_ticket,request.getQueryString()));


    }
    public static Map<String, String> sign(String jsapi_ticket, String url) {
        Map<String, String> ret = new HashMap<String, String>();
        String nonce_str = create_nonce_str();
        String timestamp = create_timestamp();
        String string1;
        String signature = "";


        //注意这里参数名必须全部小写，且必须有序
        string1 = "jsapi_ticket=" + jsapi_ticket +
                "&noncestr=" + nonce_str +
                "×tamp=" + timestamp +
                "&url=" + url;
        System.out.println(string1);


        try
        {
            MessageDigest crypt = MessageDigest.getInstance("SHA-1");
            crypt.reset();
            crypt.update(string1.getBytes("UTF-8"));
            signature = byteToHex(crypt.digest());
        }
        catch (NoSuchAlgorithmException e)
        {
            e.printStackTrace();
        }
        catch (UnsupportedEncodingException e)
        {
            e.printStackTrace();
        }


        ret.put("url", url);
        ret.put("jsapi_ticket", jsapi_ticket);
        ret.put("nonceStr", nonce_str);
        ret.put("timestamp", timestamp);
        ret.put("signature", signature);


        return ret;
    }


    private static String byteToHex(final byte[] hash) {
        Formatter formatter = new Formatter();
        for (byte b : hash)
        {
            formatter.format("%02x", b);
        }
        String result = formatter.toString();
        formatter.close();
        return result;
    }
    private static String create_nonce_str() {
        return UUID.randomUUID().toString();
    }
    private static String create_timestamp() {
        return Long.toString(System.currentTimeMillis() / 1000);
    }

前端

uxfn.get({
   url: '../../sys/wechat/jsApiTicket?'+encodeURIComponent(location.href.split('#')[0]),
   success: function (data) {
      console.log(data.data)
      let myappid= "wxc99325e1a29dd4fd"
      wx.config({
         debug: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
         appId: "wxc99325e1a29dd4fd", // 必填，公众号的唯一标识
         timestamp:data.data.timestamp.toString(), // 必填，生成签名的时间戳
         nonceStr: data.data.nonceStr.toString(), // 必填，生成签名的随机串
         signature: data.data.signature,// 必填，签名
         jsApiList: ['chooseImage'] // 必填，需要使用的JS接口列表
      })
   }

})