code: public static String getPerpetualQR_senceId(String access_token, int senceId) {
  		// 获取数据的地址（微信提供）
  		String url = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=" + access_token;
  		JsonObject content = new JsonObject();
  		content.addProperty("action_name", "QR_LIMIT_SCENE");
  		JsonObject scene = new JsonObject();
  		scene.addProperty("scene_id", senceId);
  		JsonObject action_info = new JsonObject();
  		action_info.add("scene", scene);
  		content.add("action_info", action_info);
  		// 发送给微信服务器的数据
  		String jsonStr = content.toString();
  		String qrurl = null;
  		try {
  			HttpUtil http = new HttpUtil();
  			byte[] data = http.httpsPost(url, jsonStr.getBytes());
  			JsonObject json = new JsonParser().parse(new String(data)).getAsJsonObject();
  			qrurl = json.get("url").getAsString();
  		} catch (Exception e) {
  			e.printStackTrace();
  		}
  		return qrurl;
  	}
docs: 生成永久二维码
  http请求方式: POST URL:
  https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=TOKEN
  POST数据格式：json POST数据例子：{"action_name": "QR_LIMIT_SCENE", "action_info":
  {"scene": {"scene_id": 123}}}
  @param senceId
  @return