Lua 关于时间的相关的方法

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关于时间的相关的方法

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function print_r ( t )  
    local print_r_cache={}
    local function sub_print_r(t,indent)
        if (print_r_cache[tostring(t)]) then
            print(indent.."*"..tostring(t))
        else
            print_r_cache[tostring(t)]=true
            if (type(t)=="table") then
                for pos,val in pairs(t) do
                    if (type(val)=="table") then
                        print(indent.."["..pos.."] => "..tostring(t).." {")
                        sub_print_r(val,indent..string.rep(" ",string.len(pos)+8))
                        print(indent..string.rep(" ",string.len(pos)+6).."}")
                    elseif (type(val)=="string") then
                        print(indent.."["..pos..'] => "'..val..'"')
                    else
                        print(indent.."["..pos.."] => "..tostring(val))
                    end
                end
            else
                print(indent..tostring(t))
            end
        end
    end
    if (type(t)=="table") then
        print(tostring(t).." {")
        sub_print_r(t,"  ")
        print("}")
    else
        sub_print_r(t,"  ")
    end
    print()
end

local nowTime = os.time()
print("当前时间戳:"..nowTime)

local nowDate = os.date("%Y-%m-%d %H:%M:%S", nowTime)
print("转换成时间:"..nowDate)

local nowTable = os.date("*t", nowTime)
print("时间戳转为table:")
print_r(nowTable)

print("table转为时间戳:".. os.time(nowTable))

print("自定义时间:"..os.time({year=2020, month=1, day=1,hour=0,min=0,sec=0}))

print("获取时间戳对应的日期")
--获取时间戳对应的天数（天数规则不是自然天，是(hour)4点前当前一天算）
function GetDayKeyByUnixTime(unixTime,hour)
    if hour == nil then hour = 0 end
    local retStr = os.date("%Y-%m-%d %H:%M:%S",unixTime)
    local time = unixTime
    local data = os.date("*t",time)
    --dump(data)

    --(hour)4点前按前一天算
    if data.hour < hour then
        time = time - 24*60*60        
    end

    local data2 = os.date("*t",time)
    --dump(data2)
    data2.hour = 0
    data2.min = 0
    data2.sec = 0

    local time2 = os.time(data2)

    local dayKey = os.date("%Y%m%d",time2)
    local timeBase = time2

    --天数key，日期格式字符串，天数key 0点的时间戳
    return dayKey,retStr,timeBase
end
local time1 = os.time({year=2020,month=1,day=1})
local time2 = os.time({year=2020,month=1,day=10})

local dayKey,str = GetDayKeyByUnixTime(time1,4)
print("dayKey = "..dayKey.."  str = "..str)
dayKey,str = GetDayKeyByUnixTime(time2,4)
print("dayKey = "..dayKey.."  str = "..str)

--两个时间的天数差              --时间戳1  时间戳2  多少点开始算第二天
function NumberOfDaysInterval(unixTime1,unixTime2,dayFlagHour)
    if dayFlagHour == nil then dayFlagHour = 0 end
    local key1,str1,time1 = GetDayKeyByUnixTime(unixTime1,dayFlagHour)
    local key2,str2,time2 = GetDayKeyByUnixTime(unixTime2,dayFlagHour)

    local sub = math.abs(time2 - time1)/(24*60*60)
    print(str1.." 与 "..str2.."相差的天数："..sub)

    return sub
end

local sub = NumberOfDaysInterval(time1,time2,0)
print(sub)
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当前时间戳:1611828502
转换成时间:2021-01-28 18:08:22
时间戳转为table:
table: 0x13c89a0 {
  [hour] => 18
  [min] => 8
  [wday] => 5
  [day] => 28
  [month] => 1
  [year] => 2021
  [sec] => 22
  [yday] => 28
  [isdst] => false
}

table转为时间戳:1611828502
自定义时间:1577808000
获取时间戳对应的日期
dayKey = 20200101  str = 2020-01-01 12:00:00
dayKey = 20200110  str = 2020-01-10 12:00:00
2020-01-01 12:00:00 与 2020-01-10 12:00:00相差的天数：9
9

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