Get dates of last week - Please Help !

Question

Hi All,
I have to make a query for retrieving the data for the last one week from a table say "Orderdata".
So can anybody please tell me how to retrieve date of last weak from the current date. I mean if current date is 12/08/2004 (mm/dd/yyyy) then I would be needing date as :--
12/01/2004 (mm/dd/yyyy) to 12/07/2004 (mm/dd/yyyy).
To more clear, here is the query that am using :
select * from orderdata where orderdate between 12/01/2004 AND 12/07/2004
I know I would be needing java.sql.timestamp class to set date . but it is the last thing to do .
First I have to get date of last weak...........
Here is the code----------that i have just start to write ..
Calendar cal;
TimeZone tz;
String estTimezone="GMT-05:00";
tz=TimeZone.getTimeZone(estTimezone);
cal=new GregorianCalendar(tz);
cal.setTimeZone(tz);
String currentdate=String.valueOf(cal.get(Calendar.MONTH)+1);
currentdate+="/"+String.valueOf(cal.get(Calendar.DAY_OF_MONTH)-1);
currentdate+="/"+String.valueOf(cal.get(Calendar.YEAR));
out.println(currentdate);And assume if current date is 12/1/2004 (mm/dd/yyyy) then subtracting -1 form the current date will give 12/00/2004 so not getting the correct result .
Hope it is clear to all................
Please Help !
amitindia

Answer 1

Hi All,
Thanks chirag813 for your coding. and thanks to all.
By the way I have to change time in EST and also required start date and end date of last weak. So my final coding is as:
Please have a look into the code and tell me whether the code is correct / fine or not.
Do I need to call the getInstance() method in my code as you (chirag813) have put in your code
Calendar calendar = Calendar.getInstance();
Is my code fine ?
Please Answer..................
String startdate;
String enddate;
Calendar cal;
TimeZone tz;
String estTimezone="GMT-05:00";
// is this line correct to get startdate
SimpleDateFormat sdfStartdate= new SimpleDateFormat("yyyy-MM-dd 00:00:00");
// is this line correct to get enddate
SimpleDateFormat sdfEnddate= new SimpleDateFormat("yyyy-MM-dd 23:59:59");
tz=TimeZone.getTimeZone(estTimezone);
cal=new GregorianCalendar(tz);
cal.setTimeZone(tz);
cal.add(Calendar.DATE,-7);
startdate=sdfStartdate.format(cal.getTime());
cal.add(Calendar.DATE,6);
enddate=sdfEnddate.format(cal.getTime());
Timestamp t1=Timestamp.valueOf(startdate);
Timestamp t2=Timestamp.valueOf(enddate);
out.println(t1);
out.println("<br>"+t2);
And finally I have used Timestamp class to change the date (String) to Timestampt.
Thanks !
amitindia
SCJP 1.2