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公众号扫码登陆

公众号扫码登陆

作者: 梦过无烟 | 来源:发表于2022-01-07 16:23 被阅读0次

    第一步、 获取微信token

     public String getWxAccessToken() {
    
            String accessToken = (String) redissonClient.getBucket(wxToken).get();
            if (StrUtil.isEmpty(accessToken)) {
                String url = String.format(
                        "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s",
                        appConfig.getWxAppid(), appConfig.getWxSecret());
                String result = HttpUtil.get(url);
                JSONObject jsonObject = JSONObject.parseObject(result);
                accessToken = jsonObject.getString("access_token");
                Long expiresIn = jsonObject.getLong("expires_in");
                redissonClient.getBucket(wxToken).set(accessToken, expiresIn, TimeUnit.SECONDS);
            }
    
            return accessToken;
        }
    

    第二步、获取二维码

    public QrCodeModel getQrCode() {
    
            String url =
                    String.format("https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=%s", getWxAccessToken());
    
            JSONObject paramJson = new JSONObject();
            paramJson.put("expire_seconds", 86400);
            paramJson.put("action_name", "QR_STR_SCENE");
    
            JSONObject sceneInfo = new JSONObject();
            sceneInfo.put("scene_id", ObjectId.getObjectId());
    
            JSONObject scene = new JSONObject();
            scene.put("scene", sceneInfo);
    
            paramJson.put("action_info", scene);
            paramJson.put("scene_str", ObjectId.getObjectId());
    
            String result = HttpUtil.post(url, paramJson.toJSONString());
            logger.debug(result);
    
            QrCodeModel model = new QrCodeModel();
            JSONObject jsonObject = JSON.parseObject(result);
            model.setTicket(jsonObject.getString("ticket"));
            model.setUrl(jsonObject.getString("url"));
            return model;
        }
    

    第三步 获取用户信息

    #页面根据生成二维码时的 ticket 轮询获取用户信息
    #后端获取用户信息
    public OpenUserInfoModel queryUserInfoByOpenid(String openid) {
    
            // 客户登陆
    
            if (StrUtil.isEmpty(openid)) {
                throw new BusinessException(1001, "微信平台返回openid错误");
            }
    
            String url = String.format("https://api.weixin.qq.com/cgi-bin/user/info?access_token=%s&openid=%s&lang=zh_CN",
                    getWxAccessToken(), openid);
    
            String result = HttpUtil.get(url);
    
            JSONObject jsonObject = JSONObject.parseObject(result);
            WxUserInfoModel wxUserModel = new WxUserInfoModel();
            wxUserModel.setOpenid(openid);
            wxUserModel.setNickName(jsonObject.getString("nickname"));
            if (!org.springframework.util.StringUtils.isEmpty(wxUserModel.getNickName())) {
                wxUserModel.setNickName(wxUserModel.getNickName());
            }
            wxUserModel.setGender(jsonObject.getInteger("sex"));
            wxUserModel.setProvince(jsonObject.getString("province"));
            wxUserModel.setCity(jsonObject.getString("city"));
            wxUserModel.setCountry(jsonObject.getString("country"));
            wxUserModel.setAvatarUrl(jsonObject.getString("headimgurl"));
            wxUserModel.setUnionid(jsonObject.getString("unionid"));
          //处理你自己的业务逻辑
        }
    

    微信公众号回调事件处理

    /***
         * 微信服务器触发get请求用于检测签名
         * 
         * @return
         */
        @GetMapping("/handleWxCheckSignature")
        @ApiOperation(value = "签名检测")
        public String handleWxCheckSignature(HttpServletRequest request) {
    
            String echostr = request.getParameter("echostr");
            return echostr;
        }
    
        /**
         * 接收微信推送事件
         * 
         * @param request
         * @return
         */
        @PostMapping("/handleWxCheckSignature")
        @ApiOperation(value = "微信事件处理")
        public String handleWxEvent(HttpServletRequest request) {
    
            try {
                InputStream inputStream = request.getInputStream();
    
                StringBuilder sb = new StringBuilder();
                String line;
    
                BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
                while ((line = br.readLine()) != null) {
                    sb.append(line);
                }
    
                Map<String, Object> objectMap = XmlUtil.xmlToMap(sb.toString());
    
                logger.debug("map:{}", objectMap);
    
                String userOpenId = (String) objectMap.get("FromUserName");
                String ticket = (String) objectMap.get("Ticket");
    
                String event = (String) objectMap.get("Event");
    
                if (subscribe.equalsIgnoreCase(event) || scan.equalsIgnoreCase(event)) {
                    // 查询ticket是否存在
                    Boolean aBoolean = openUserInfoService.checkUserTicket(userOpenId, ticket);
                    if (aBoolean) {
                        return "success";
                    }
    
                    // 获取用户信息
                    openUserInfoService.queryUserInfoByOpenid(userOpenId);
                    // 保存二维码ticket
                    openUserInfoService.saveUserTicket(userOpenId, ticket);
    
                    String result = "<xml>\n" + "  <ToUserName><![CDATA[" + userOpenId + "]]></ToUserName>\n"
                            + "  <FromUserName><![CDATA[" + appConfig.getFromUserName() + "]]></FromUserName>\n"
                            + "  <CreateTime>" + System.currentTimeMillis() / 1000 + "</CreateTime>\n"
                            + "  <MsgType><![CDATA[text]]></MsgType>\n" + "  <Content><![CDATA[登录成功]]></Content>\n"
                            + "</xml>";
                    return result;
                }
    
                return "success";
            } catch (Exception e) {
                //ignore
            }
    
            return "success";
        }
    

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