Lua获取系统时间和时间格式化方法及格式化参数

一、系统当前时间对应的时间戳
复制代码 代码如下:
local ntime = os.time
print(ntime)

二、格式化时间显示，参考下表
常用于设置header等
复制代码 代码如下:
ngx.header["Last-Modified:"]  = os.date("%a, %d %b %Y %X GMT")
ngx.header["Content-Type"]    = "text/html; charset=utf-8"
ngx.header["Cache-Control"]   = "public"
ngx.header["Expires"]         = os.date("%a, %d %b %Y %X GMT", os.time() + cdnCacheTime)

%a

abbreviated weekday name (e.g., Wed)

%A

full weekday name (e.g., Wednesday)

%b

abbreviated month name (e.g., Sep)

%B

full month name (e.g., September)

%c

date and time (e.g., 09/16/98 23:48:10)

%d

day of the month (16) [01-31]

%H

hour, using a 24-hour clock (23) [00-23]

%I

hour, using a 12-hour clock (11) [01-12]

%M

minute (48) [00-59]

%m

month (09) [01-12]

%p

either "am" or "pm" (pm)

%S

second (10) [00-61]

%w

weekday (3) [0-6 = Sunday-Saturday]

%x

date (e.g., 09/16/98)

%X

time (e.g., 23:48:10)

%Y

full year (1998)

%y

two-digit year (98) [00-99]

%%

the character '%'