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_YU38f219MZkfV9Q8C-PIHS1rnb9zWCBR6RjvEvP3_179Pk6Z5hKoDx-quuczItkTGjkdrpiKVbNxHJclw9xXC8JHm3QSU0C0do1_r60wFJSwh9RaSsONcguqmDwHQGaAJAUDT","expires_in":7200,"errcode":null,"errmsg":null}
