// 获取小程序Accesstoken
String url = String.format(path, id,se);
String result = HttpUtil.get(url);
String at= JSONUtil.parseObj(result).get("access_token").toString();

// 获取二维码
String codeUrl = String.format(qcode_url, at);
Random rand = new Random();
int scene = rand.nextInt(90000000) + 10000000;
Map map = new HashMap<>();
map.put("scene", scene);
map.put("page", "pages/index/index");
map.put("check_path", false);
map.put("env_version", "trial"); // 体验版
String r = HttpUtil.post(codeUrl, JSONUtil.toJsonStr(map));