delphi 获取 13位时间戳 与 互转

  啦啦啦，拿去用，不谢 

//获取13或10位时间戳
function Gettamptime(vlen: Integer): string;
var
  timen, time2: TDateTime;
  ss2, ss3: Int64;
begin
  timen := now;
  time2 := EncodeDateTime(1970, 1, 1, 0, 0, 0, 0);
  ss2 := 28800000;
  ss3 := MilliSecondsBetween(timen, time2);
  ss3 := ss3 - ss2;
  Result := InttoStr(ss3);
  if vlen = 13 then
    Result := Result
  else if vlen = 10 then
    Result := Copy(Result, 1, 10);
end;


//转位普通时间

function gettamptotime(vtamp: string): string;
//1582688206607
var
  ls10,lms: string;

begin
  if Length(vtamp) = 10 then

  Result := FormatDateTime('yyyy-MM-dd hh:mm:ss',UnixToDateTime(StrToInt64(vtamp),false))
  else if Length(vtamp) = 13 then
  begin
     ls10 := Copy(vtamp,1,10);
     lms := Copy(vtamp,11,13);
     Result := FormatDateTime('yyyy-MM-dd hh:mm:ss',UnixToDateTime(StrToInt64(ls10),false));
     Result := Result +'.' + lms;
  end;
end;