淘宝：http://api.m.taobao.com/rest/api3.do?api=mtop.common.getTimestamp
{"api":"mtop.common.getTimestamp","v":"*","ret":["SUCCESS::接口调用成功"],"data":{"t":"1575340959355"}}
时间long 值, 用于时间比较好
苏宁：http://quan.suning.com/getSysTime.do
{"sysTime2":"2019-12-03 10:42:54","sysTime1":"20191203104254"}
可以直接显示字符串
