java微信扫描公众号二维码实现登陆功能

public static String getSceneTicket(String type,String sceneId){   WxScene scene = new WxScene();   scene.setAction_name(type);   scene.setSceneId(Integer.parseInt(sceneId));   scene.setExpire_seconds(1800);   String jsonScene = JSONObject.fromObject(scene).toString();   String url = WeixinContents.qr_scene_ticket_url.replaceAll("ACCESS_TOKEN", getAccessToken(WeixinContents.appid,WeixinContents.appsecret).getToken());   System.out.println(jsonScene);   JSONObject jsonObject = httpRequest(url, "POST", jsonScene);   int result = 0;   String ticket = "";   if (null != jsonObject) {    if (jsonObject.containsKey("errcode")) {     result = jsonObject.getInt("errcode");    }else{     ticket = jsonObject.getString("ticket");    }   }   return ticket;  }