微信小程序中发送一次性订阅消息和设备长期订阅消息

1 发送一次性订阅消息代码

 /**
     * 发送一次性订阅消息
     */
    public static String sendWxAppMessage(String openId, String templateId, JSONObject json, String jumpAddress) {
        String url = Constants.WECHAT_GET_TOKEN + Constants.WECHAT_APPID + appId + Constants.WECHAT_SECRET + secret;
        String access_token = "";
        String code = "";
        try (Response response = OkHttpUtil.get(url)) {
            log.info("接口调用凭证：response=" + response.toString());
            if (response.isSuccessful()) {
                JSONObject resData = JSON.parseObject(response.body().string());
                Integer errcode = resData.getInteger("errcode");
                if (errcode == null || errcode == 0) {
                    access_token = resData.getString("access_token");
                    if (StringUtils.isNotEmpty(access_token)) {
                        log.info("接口调用凭证：access_token =" + access_token);
                        String sendUrl = Constants.WECHAT_SEND + access_token;
                        JSONObject param = new JSONObject();
                        param.put("touser", openId);
                        param.put(&