5：获取微信公众号全局唯一接口凭证的url:https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wx5accef030a19cd6b&secret=28a03cb9604ab5116b41e7a44fbab0a6 
 ; 结果：{"access_token":"96_7riR3Ds8V8xnZqkm5u7-4tptqTuaZaIwJzZf1LwgzqLE1PLSc3B_0KLKekVVNKpulErhDlm1H74IFm0Bv4Rh5FkiQeogQkvB44uwLiQN806x6_9QDO0CoFHhI6ASGIeADADRT","expires_in":7200,"errcode":null,"errmsg":null}