JSP obtains the current date and time

1. First, let's see how to get the current time and display the Code:

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<%

Java. Text. simpledateformat formatter = newjava. Text. simpledateformat ("yyyy-mm-dd hh: mm: SS ");

Java. util. Date currenttime = new java. util. Date (); // obtain the current system time

String str_date1 = formatter. Format (currenttime); // format the date and time.

String str_date2 = currenttime. tostring (); // converts a date to a string.

%>

 

 

Formatted as "yyyy-mm-DDHH: mm: SS": <% = str_date1 %>

Unformatted Date and Time in string format: <% = str_date2 %>

Unformatted Date Format: <% = currenttime %>

 

 

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Page output content:

Formatted as "yyyy-mm-DDHH: mm: SS" Date and Time: 2005-03-1709: 55: 40

Unformatted string format Date and Time: Thu Mar 17 09:55:40 CST 2005

Unformatted Date Format: Thu Mar 17 09:55:40 CST 2005

 

Usually we need the formatted time: 09:55:40. Now there is a question: "09:55:40" is a string. Sometimes we need to extract information about the year, month, and day in this string. What should we do? See the following code:

-------------------- Rule string ----------------------------------------------

String of the rule (four digits of the year, two digits of the month, two digits of the day, separated by the character "-" in the middle ):

<Br> the original string is:

<%

String date = "1989-12-30 ";

Out. println (date + "<br> ");

String year = date. substring (0th); // The value ranges from 4th.

String month = date. substring (5th); // The value ranges from 7th.

String day = date. substring (8th); // you can specify 10th + 1 to digits.

Out. println ("year =" + year + ", month =" + month + ", Day =" + Day );

%>

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From the code above, we can see that this is only applicable to the rule string (4 digits in a year, 2 digits in a month, and 2 digits in a day). What if it is irregular? The year may have two or four digits, and the month and the day may have one or two digits. What should I do? By modifying the code above, you can get the following general code (this "general" has a premise that the "-" must be separated between years, months, and days ):

---------------------- Irregular string ----------------------------------------------

Irregular string (the length of year, month, and day is not necessarily separated by the character "-" in the middle ):

<Br> the original string is:

<%

String date = "04-05-6 ";

Out. println (date + "<br> ");

Int A = date. indexof ("-"); // calculates the number of digits of the first "-".

Int B = date. lastindexof ("-"); // calculates the number of digits of the last "-".

Int Len = date. Length (); // evaluate the length of a string

Year = date. substring (0, a); // obtain the string before the first "-".

Month = date. substring (a + 1, B); // obtain the string between two "-".

Day = date. substring (B + 1, Len); // obtain the string after the last "-"

Out. println ("year =" + year + ", month =" + month + ", Day =" + Day );

%>

 

 

 

JSP obtains the current date and time (2009-05-0901: 24: 45) label: JSP
Time it
Category: JSP-Servlet

 

<Script language = "JavaScript">

VaR mydate = new date ();

Mydate. getyear (); // obtain the current year (2 digits)

Mydate. getfullyear (); // obtain the complete year (4 bits, 1970 -????)

Mydate. getmonth (); // obtain the current month (0-11, 0 represents January)

Mydate. getdate (); // obtain the current day (1-31)

Mydate. getday (); // obtain X of the current week (0-6, 0 indicates Sunday)

Mydate. gettime (); // obtain the current time (milliseconds starting from 1970.1.1)

Mydate. gethours (); // obtain the current hour (0-23)

Mydate. getminutes (); // obtain the current number of minutes (0-59)

Mydate. getseconds (); // obtain the current number of seconds (0-59)

Mydate. getmilliseconds (); // obtain the current number of milliseconds (0-999)

Mydate. tolocaledatestring (); // obtain the current date

Varmytime = mydate. tolocaletimestring (); // obtain the current time

Mydate. tolocalestring (); // obtain the date and time

 

If (mytime <"23:30:00 ")

{Alert (mytime );}

</SCRIPT>

 

<%

Java. Text. simpledateformat formatter = newjava. Text. simpledateformat ("yyyy-mm-dd hh: mm: SS ");

 

Java. util. Date currenttime = new java. util. Date (); // obtain the current system time

 

String str_date1 = formatter. Format (currenttime); // format the date and time.

String str_date2 = currenttime. tostring (); // converts a date to a string.

%>

 

 

<Tdclass = "classtd"> <% = str_date1 %> </TD>

 

 

 

On (rolover ){

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} On (rolout ){

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}