Question

How come that java.sql.PreparedStatement#setDate on dateTime mysql column always results in Date format like 2012-10-16 00:00:00 without Time information ? I’m storing Date in a loop like this :

protected Date getIncrementedDateTime() {
    additionalTime += 1000;
    return new Date(System.currentTimeMillis() + additionalTime);
}


preparedStatement.setDate(j, new java.sql.Date(getIncrementedDateTime().getTime());

I debugged the values, but mysql database always have 2012-10-16 00:00:00 values.

Answer 1

As per the documentation for java.sql.Date:

A thin wrapper around a millisecond value that allows JDBC to identify this as an SQL DATE value. […]

To conform with the definition of SQL DATE, the millisecond values wrapped by a java.sql.Date instance must be ‘normalized’ by setting the hours, minutes, seconds, and milliseconds to zero in the particular time zone with which the instance is associated.

Basically, for a datetime column you should probably be using a different type, e.g. Timestamp. (That’s not ideal in other ways, but it’s likely to be a better fit…)