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access toekn

出現了Exception in thread "main" net.sf.json.JSONException: JSONObject["expires_in"] not found.這個問題

?public?static?AccessToken?getAccessToken()?throws?Exception?{
????????//?TODO?code?application?logic?here
???????AccessToken?token?=?new?AccessToken();
????????String?url?=?ACCESS_TOKEN_URL.replace("APPID",?APPID).replace("APPSECRET",?APPSECRET);
????????WeixinUtil?wx=new?WeixinUtil();
????????System.out.println(url);
????????
????????while(true){
????????????JSONObject?jsonObject?=wx.httpsRequest(url,"GET",null);
????????????if(null?!=?jsonObject){
???????????
????????????????token.setToken(jsonObject.getString("access_token"));
????????????????token.setExpiresIn(jsonObject.getInt("expires_in"));
//????????????????獲取到的access_tocken值可以寫入到文本文件中供其他業務邏輯調用，實例中只打印了沒有保存到文件
???????????????System.out.println("獲取成功"+token.getToken()+"||expires_in="+token.getExpiresIn());
???????????????
????????????}
????????????//休眠1小時57分鐘，提前3分鐘獲取新的access_token
????????????sleep((7200-7000)*1000);
????????}