Discussion - Date/Time POJO property - String or java.util.Date

Hi,
I always wonder how date/time should be declared in POJOs - String or java.util.Date. I have used both and always felt comfortable with String but still would like to know your views. (In DB datatype is datetime).
I know some of you will say "as per requirement" but what I have experienced we never give too much thought and when we have issues down the line we start wondering.

I always wonder how date/time should be declared in POJOs - String or java.util.Date. I have used both and always felt comfortable with String but still would like to know your views.
(In DB datatype is datetime).If the latter is a given, then I would definitely use a Date. Doing the Date/String conversion at the DAO level seems an improper location; in particular, it constrains what upper layers can do with it:
- if the business logic has to do date/time computation, it will have to convert back to Date (or Joda DateTime)
- if the UI needs a different representation than the one that was used in the DAO (such as, different time zone, or showing only the month, whatever,...) it will probably need such a conversion too, and another one for the reformatting (or clumsy code parsing the date string).
I know some of you will say "as per requirement" but what I have experienced we never give too much thought and when we have issues down the line we start wondering.I can easily see the issues caused by premature conversion to String. But what kind of issues do you risk if you keep the Date representation?
In summary, I'm all in favor of using a Date (or Joda DateTime ) all along, until it's eventually displayed.
Regards,
J.

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next program:
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If I don't define queryArray with the package and class, the compiler
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So what you have to do is explicitly tell the compiler which one you really want by spelling out the fully-resolved class name:
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=============================
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You can search the forums for that error message and find previous discussions - they all boil down to the same problem. Somewhere in your query that calls this function, the code invoked implicitly converts from string to date/datetime. In general,
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Tibor's site

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Hi,
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import java.sql.Date;
import java.text.ParseException;
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Date aDate = null;
try
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Thanks in advance.
Regards,
Rajapriya.R.

If I put this value into the database table, I can
see only the date. Time part is missing. Is this the
problem with java.sql.Date or Oracle datatype Date?This is not a problem, this is the defined behaviour of the Date type. RTFAPI and have a look at Timestamp, while you're at it.

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Hi,
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This is what I did:
String dateAsString = "10/01/2007";
SimpleDateFormat formatter = new SimpleDateFormat("MM/dd/yyyy");
formatter.setTimeZone(TimeZone.getTimeZone("GMT"));
formatter.setLenient(false);
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I used the following code:
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But this code give only the date, not time 2007-09-30
Can anybody tell me how I can change this java date to sql date (or datetime?) so that I can get both date and time.
Thanks,
semaj

semaj07 wrote:
Hi,
I am trying to convert string (MM/dd/yyyy format) to UTC date time and store in the database.
This is what I did:
String dateAsString = "10/01/2007";
SimpleDateFormat formatter = new SimpleDateFormat("MM/dd/yyyy");
formatter.setTimeZone(TimeZone.getTimeZone("GMT"));
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java.util.date dateValue = formatter.parse(dateAsString, new ParsePosition(0));
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Now I need to store this date and time to MS SQL database.
I used the following code:
java.sql.Date sqlDateValue = new java.sql.Date(parsedToDate.getTime());
But this code give only the date, not time 2007-09-30
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Thanks,
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 END AS 'Document Type',
 T0.DueDate, (T0.Debit- T0.Credit) 'Balance'
 ,ISNULL((SELECT T0.Debit-T0.Credit WHERE DateDiff(day, T0.DueDate,'[%1]')<=-1),0) 'Future'
 ,ISNULL((SELECT T0.Debit-T0.Credit WHERE DateDiff(day, T0.DueDate,'[%1]')>=0 and DateDiff(day, T0.DueDate,'[%1]')<=30),0) 'Current'
 ,ISNULL((SELECT T0.Debit-T0.Credit WHERE DateDiff(day, T0.DueDate,'[%1]')>30 and DateDiff(day, T0.DueDate,'[%1]')<=60),0) '31-60 Days'
 ,ISNULL((SELECT T0.Debit-T0.Credit WHERE DateDiff(day, T0.DueDate,'[%1]')>60 and DateDiff(day, T0.DueDate,'[%1]')<=90),0) '61-90 Days'
 ,ISNULL((SELECT T0.Debit-T0.Credit WHERE DateDiff(day, T0.DueDate,'[%1]')>90 and DateDiff(day, T0.DueDate,'[%1]')<=120),0) '91-120 Days'
 ,ISNULL((SELECT T0.Debit-T0.Credit WHERE DateDiff(day, T0.DueDate,'[%1]')>=121),0) '121+ Days'
FROM JDT1 T0 INNER JOIN OCRD T1 ON T0.ShortName = T1.CardCode
WHERE (T0.MthDate IS NULL OR T0.MthDate > ?) AND T0.RefDate <= ? AND T1.CardType = 'C'
ORDER BY T1.CardCode, T0.DueDate, T0.Ref1

Hi,
The above error appears due to date format is differnt from SAP query generator and SQL server.
So you need convert all date in above query to SQL server required format.
Try to convert..let me know if not possible.
Thanks & Regards,
Nagarajan

SAP query error - 1). [Microsoft][SQL Server Native Client 10.0][SQL Server]Conversion failed when converting date and/or time from character string. 'Received Alerts' (OAIB)

SAP query error - 1). [Microsoft][SQL Server Native Client 10.0][SQL Server]Conversion failed when converting date and/or time from character string. 'Received Alerts' (OAIB)
SELECT
CASE WHEN T0.DocStatus = 'O' THEN 'OPEN'
WHEN T0.DocStatus = 'C' THEN 'CLOSED' END AS 'Document Status',
T0.DocDate AS 'Posting Date',
T0.DocNum AS 'Doc.No',
T0.NumAtCard,
T0.TransId AS 'Trans. No.',
T0.Comments AS 'Remarks',
T0.CardCode AS 'Offset Acct',
T0.CardName AS 'Offset Acct Name',
sum(T0.DocTotal) + (T0.WTSum) as 'DocTotal',
T3.DueDate AS 'Cheque Date',
T3.CheckSum AS 'Amount'
FROM ODPO AS T0 LEFT OUTER JOIN
 VPM2 AS T1 ON T0.ObjType = T1.InvType AND T0.DocEntry = T1.DocEntry LEFT OUTER JOIN
 OVPM AS T2 ON T2.DocEntry = T1.DocNum LEFT OUTER JOIN
 VPM1 AS T3 ON T2.DocEntry = T3.DocNum
where T0.DocDate>='[%0]' and T0.DocDate<='[%1]'

Hi,
Try this:
SELECT
CASE WHEN T0.DocStatus = 'O' THEN 'OPEN'
WHEN T0.DocStatus = 'C' THEN 'CLOSED' END AS 'Document Status',
T0.DocDate AS 'Posting Date',
T0.DocNum AS 'Doc.No',
T0.NumAtCard,
T0.TransId AS 'Trans. No.',
T0.Comments AS 'Remarks',
T0.CardCode AS 'Offset Acct',
T0.CardName AS 'Offset Acct Name',
sum(T0.DocTotal) + (T0.WTSum) as 'DocTotal',
T3.DueDate AS 'Cheque Date',
T3.CheckSum AS 'Amount'
FROM ODPO T0 LEFT OUTER JOIN
 VPM2 T1 ON T0.ObjType = T1.InvType AND T0.DocEntry = T1.DocEntry
LEFT OUTER JOIN
 OVPM T2 ON T2.DocEntry = T1.DocNum LEFT OUTER JOIN
 VPM1 T3 ON T2.DocEntry = T3.DocNum
where T0.DocDate >= '[%0]' and T0.DocDate <='[%1]'
group by T0.DocStatus,T0.DocDate ,
T0.DocNum ,
T0.NumAtCard,
T0.TransId ,
T0.Comments ,
T0.CardCode,
T0.CardName ,
T0.WTSum ,
T3.DueDate ,
T3.CheckSum
Thanks & Regards,
Nagarajan

Discussion - Date/Time POJO property - String or java.util.Date

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