Common date formatter and QT method for obtaining current time

Common date formatter and its meaning ：

character	significance
yy	year , Two digit display ,00-99
yyyy	year , Four digit display , Such as 2016
M	month , Display without zero padding ,1-12
MM	month , Zero filling display ,01-12
d	God , Display without zero padding ,1-31
dd	God , Zero filling display ,01-31
h	Hours , No zeros ,0-23 or 1-12（ If it shows AM/PM）
hh	Hours , Zero compensation 2 Bit display ,00-23 or 01-12（ If it shows AM/PM）
H	Hours , No zeros ,0-23 or 1-12（ Even if it shows AM/PM）
HH	Hours , Zero compensation 2 Bit display ,00-23 or 01-12（ Even if it shows AM/PM）
m	minute , No zeros ,0-59
mm	minute , Zero filling display ,00-59
z	millisecond , No zeros ,0-999
zzz	millisecond , Zero compensation 3 Bit display ,000-999
AP or A	Use AM/PM Show
ap or a	Use am/pm Show

Text conversion date ：

QDateTime dateTime = QDateTime::fromString("2022/06/23 23:05:24","yyyy/MM/dd hh:mm:ss");

Date conversion text ：

QString timeStr = QDateTime::currentDateTime().toString("yyyy year MM month dd Japan  hh when mm branch ss second ");
QString timeStr1 = dateTime.toString("yyyy year MM month dd Japan  hh when mm branch ss second ");