Getting started with date Processing in java

Java getting started Date Processing in Java-general Linux technology-Linux programming and kernel information. The following is a detailed description. 1. Date Template

The template is defined as follows:

Year y, such as 1996

M month, such as July or 07

D The day of the month, such as 12

H hour (in 24 format), such as 0 and 17

M minutes, such as 32

S banknote clock, such as 55

S notes, such as 978

E day of the week, such as Tuesday

D The day of the year, such as 189

W week in year (Number) 27

W week in month (Number) 2

A am/pm marker (Text) PM

K hour in day (1 ~ 24) (Number) 24

K hour in am/pm (0 ~ 11) (Number) 0

Z time zone (Text) Pacific Standard Time

'Escape for text (Delimiter)

''Single quote (Literal )'

2. Date Format

Use the SimpleDateFormat class to format a date. If the date format is incorrect, an exception occurs.

Import java. text .*;

Import java. util .*;

Public class TestDate {

Public static void main (String [] args ){

String dStr = "2001.12.12-08.23.21 ";

Date d = null;

SimpleDateFormat sdf = new SimpleDateFormat ("yyyy. MM. dd-HH. mm. ss ");

Try {

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D = sdf. parse (dStr );

} Catch (ParseException pe ){

System. out. println (pe. getMessage ());

}

System. out. println (d );

System. out. println (d. getTime ());

}

}

Find the SimpleDateFormat class in the java. text package and give it a template, which can be parse into a Date, and then use Date

Class getItme () method to obtain a Long data.

3. Get the current date
Public String GetDateTime ()

{

Calendar cal = Calendar. getInstance ();

SimpleDateFormat formatter = new SimpleDateFormat ("yyyy-MM-dd HH: mm: ss ");

String mDateTime = formatter. format (cal. getTime ());

Return (mDateTime );

}

Public java. SQL. Date GetDate ()

{

Java. SQL. Date mDate;

Calendar cal = Calendar. getInstance ();

SimpleDateFormat formatter = new SimpleDateFormat ("yyyy-MM-dd HH: mm: ss ");

String mDateTime = formatter. format (cal. getTime ());

Return (java. SQL. Date. valueOf (mDateTime ));

}