Java - creating an oracle date field - java

I have an Oracle Date type to which I need to insert the current date.
I am using Java to generate this date but everything I've tried so far yeilds the following error:
java.sql.SQLException: ORA-01843: not a valid month
Can anyone suggest java code to generate a proper date?
Update:
The dates in the DB look like 11-DEC-06
SO, I've tried the following:
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("d-MMM-yy");
String date = sdf.format(cal.getTime());
And this doesn't work


I would suggest instead of building a string query (which I am guessing you are doing), you instead use a PreparedStatement, which is generally easier (especially with things like this) as well as safer:
String rowToUpdate = "foo";
PreparedStatement ps = myConnection.prepareStatement(
"UPDATE my_table SET date_field=? WHERE id=?");
Calendar cal = Calendar.getInstance();
java.sql.Date sqlDate = new java.sql.Date(cal.getTime().getTime());
ps.setDate(1, sqlDate);
ps.setString(2, rowToUpdate);
int updated = ps.executeUpdate();


Use java.sql.Date or java.sql.Timestamp, depending on your requirements.
java.sql.Date sqlDate = new java.sql.Date(new java.util.Date().getTime());


If you are going to make the query using a String version of the date then you may need to add the Oracle to_date function. You could do it like this (notice the extra d in the SimpleDateFormat)
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("dd-MMM-yy");
String date = sdf.format(cal.getTime());
Then in the query you would put
String query = "select * from table where date_column=to_date('" + date +"','dd-Mon-yy')";

Related

How do I Create a java.sql.Date variable?

I'm trying to create a variable called startDate using java.sql.Date.
I've tried...
java.sql.date startDate = "02/04/2015"
But it thinks it's a string.
java.sql.date startDate = 02/04/2015
But it thinks it's an int.
java.sql.date startDate = 02-04-2015
But it displays the error "invalid character constant".
How do I properly write this variable?
Thanks.

One possible approach is to use a SimpleDateFormat and the java.sql.Date(long) constructor like
DateFormat df = new SimpleDateFormat("MM-dd-yyyy");
java.sql.Date sqlDate = new java.sql.Date(df.parse("02-04-2015").getTime());

you could also try
java.sql.Date sqlDate = new java.sql.Date(2020,12,12);
I do not know why this is deprecated, but it is very intuitive for me.
basically year, month, day integer

SQL query to return ongoing auctions

I have a table
Id AuctionName URL StartDate EndDate
1 auction1 image 2015-01-11 22:27:21 2015-01-12 14:25:22
2 auction2 video 2015-01-12 05:30:50.0 2015-01-14 08:18:10
I get the currentTimeStamp using Java like this:
public Timestamp getCurrentTimestamp(){
java.util.Date date= new java.util.Date();
SimpleDateFormat dateFormater = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentDate=dateFormater.format(date);
Timestamp currentTimestamp=Timestamp.valueOf(currentDate);
System.out.println(currentTimestamp);
return currentTimestamp;
}
This is my output.
2015-01-12 05:30:50.0
What is the right SQLQuery to retrieve currentAuctions. I would appreciate some help.

SELECT id, AuctionName FROM auctiontable WHERE (NOW() BETWEEN StartDate AND EndDate);
You could altenatively replace NOW() with the string formed in your Java code, but this is cleaner.

Storing Current date in database

I am having a column in my table of type TIMESTAMP.
In my servlet am writing the code to insert current date and time in this column like this :
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = new Date();
String sendDate = dateFormat.format(date);
ps.setString(4,sendDate);
But it throws an Exception that:
java.sql.SQLException: [Oracle][ODBC][Ora]ORA-01843: not a valid month
What can be the reason?
Please help.

Why do you use ps.setString ?
You should use ps.setDate.
EDIT
Date dateNow = new java.sql.Date(System.CurrentTimeMillis())
ps.setDate(dateNow);
Better to use timestamp tough:
ps.setTimestamp(1, new Timestamp(System.currentTimeMillis());

Incorrect date returned when converting from java.util.date to java.sql.date

I am using Eclipse Juno, GWT and java.
When I convert
I get the date via:
dateBoxDOB = new DateBox();
dateBoxDOB.setFormat(new DefaultFormat(DateTimeFormat.getFormat("dd-MM-yyyy")));
flexTable.setWidget(0, 1, dateBoxDOB);
dateBoxDOB.getDatePicker();
Where I enter 20/04/1961. I then need to convert it from java.util.date to java.sql.date before saving it to MySQL:
java.sql.Date sqlDOB = new java.sql.Date(dateBoxDOB.getValue().getTime());
Window.alert("Util date = " + dateBoxDOB.getValue().getTime());
Window.alert("DOB = " + sqlDOB);
java.sql.Date sqlDateArchived = new java.sql.Date(dateBoxArchived.getValue().getTime());
java.sql.Date sqlPackIn = new java.sql.Date(dateBoxPackIn.getValue().getTime());
java.sql.Date sqlPackOut = new java.sql.Date(dateBoxPackOut.getValue().getTime());
The date displayed by the window alert is -233920800000 for util and 1962-08-04 for sql.
How do I get the correct date please (i.e., 1961-04-20 from sql date)?
Also, if a date is null and exception is thrown. How do I get around this please?

This code works fine for me.
You are getting this issue because you defined the format as dd-MM-yyyy and entered date as 20/04/1961. Notice the change in format '-' vs '/'.

This may help you
Calendar cal = Calendar.getInstance();
DateFormat df=new SimpleDateFormat("dd/mm/yyyy");
String dateStr="20/04/1961";
Date date = df.parse(dateStr);
cal.setTime(date);
Date sqlDate = new java.sql.Date(cal.getTime().getTime());
System.out.println("utilDate:" + df.format(date));
System.out.println("sqlDate:" + df.format(sqlDate));

How to store Java Date to Mysql datetime with JPA

Can any body tell me how can I store Java Date to Mysql datetime...?
When I am trying to do so...only date is stored and time remain 00:00:00
in Mysql date stores like this...
2009-09-22 00:00:00
I want not only date but also time...like
2009-09-22 08:08:11
I am using JPA(Hibernate) with spring mydomain classes uses java.util.Date but i have created tables using handwritten queries...
this is my create statement
CREATE TABLE ContactUs (
id BIGINT AUTO_INCREMENT,
userName VARCHAR(30),
email VARCHAR(50),
subject VARCHAR(100),
message VARCHAR(1024),
messageType VARCHAR(15),
contactUsTime DATETIME,
PRIMARY KEY(id)
);

see in the link :
http://www.coderanch.com/t/304851/JDBC/java/Java-date-MySQL-date-conversion
The following code just solved the problem:
java.util.Date dt = new java.util.Date();
java.text.SimpleDateFormat sdf =
new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentTime = sdf.format(dt);
This 'currentTime' was inserted into the column whose type was DateTime and it was successful.

Annotate your field (or getter) with #Temporal(TemporalType.TIMESTAMP), like this:
public class MyEntity {
...
#Temporal(TemporalType.TIMESTAMP)
private java.util.Date myDate;
...
}
That should do the trick.

Are you perhaps using java.sql.Date? While that has millisecond granularity as a Java class (it is a subclass of java.util.Date, bad design decision), it will be interpreted by the JDBC driver as a date without a time component. You have to use java.sql.Timestamp instead.

Probably because your java date has a different format from mysql format (YYYY-MM-DD HH:MM:SS)
do this
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date date = new Date();
System.out.println(dateFormat.format(date));

you will get 2011-07-18 + time format
long timeNow = Calendar.getInstance().getTimeInMillis();
java.sql.Timestamp ts = new java.sql.Timestamp(timeNow);
...
preparedStatement.setTimestamp(TIME_COL_INDEX, ts);

mysql datetime -> GregorianCalendar
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = format.parse("2012-12-13 14:54:30"); // mysql datetime format
GregorianCalendar calendar = new GregorianCalendar();
calendar.setTime(date);
System.out.println(calendar.getTime());
GregorianCalendar -> mysql datetime
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String string = format.format(calendar.getTime());
System.out.println(string);

java.util.Date date = new Date();
Object param = new java.sql.Timestamp(date.getTime());
preparedStatement.setObject(param);

Use the following code to insert the date into MySQL. Instead of changing our date's format to meet MySql's requirement, we can help data base to recognize our date by setting the STR_TO_DATE(?, '%l:%i %p') parameters.
For example, 2014-03-12 can be represented as STR_TO_DATE('2014-03-12', '%Y-%m-%d')
preparedStatement = connect.prepareStatement("INSERT INTO test.msft VALUES (default, STR_TO_DATE( ?, '%m/%d/%Y'), STR_TO_DATE(?, '%l:%i %p'),?,?,?,?,?)");

Its very simple though conditions in this answer are in mysql the column datatype is datetime and you want to send data from java code to mysql:
java.util.Date dt = new java.util.Date();
whatever your code object may be.setDateTime(dt);
important thing is just pick the date and its format is already as per mysql format and send it, no further modifications required.

Actually you may not use SimpleDateFormat, you can use something like this;
#JsonSerialize(using=JsonDateSerializer.class)
#JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd/MM/yyyy HH:mm:ss")
private Date blkDate;
This way you can directly get the date with format as specified.

I still prefer the method in one line
new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(Calendar.getInstance().getTime())

If using java 8 or higher , try to use LocalDateTime. That was the correct type if you are using DATETIME as mysql data type.
Below is example for conver current time to "2009-09-22 08:08:11" format
LocalDateTime currentTime = LocalDateTime.parse(LocalDateTime.now().toString(), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));

it works for me !!
in mysql table
DATETIME
in entity:
private Date startDate;
in process:
objectEntity.setStartDate(new Date());
in preparedStatement:
pstm.setDate(9, new java.sql.Date(objEntity.getStartDate().getTime()));

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