* 根据时间检测目录，不存在则创建 */.

devGetDnAnaLogPath returns a filename for the analytics log file that changes hourly.

devGetLLogPath returns a filename for the log file that changes hourly.

devLogAnalytics write log in file at logFilePath in specific format for later analysis.

* * 获取当前 14 位字符长度的日期 */.

获取当前 8 位字符长度的日期 */.

* * 获取本地的ip <br/> * return [] string * 可能有双网卡，或者多个ip 。数组最后一个是默认的ip：127.0.0.1 */.

keyForValue returns the integer key in a map if the given value v exists in the map, or -1 otherwise.

randStringRunes returns a random string of length n from an array of characters.

字符串转时间戳.

开发模式.

生产模式.

测试模式.

mysql数据库标识.

sqlite.