Converting string date to date

Question

How would I convert a String date in the form of 24/04/2012 to a date variable in the format of 24-Apr-12, which can later be passed into my Oracle database.

I have tried this but it says the string date is unparsable:

DateFormat format = new SimpleDateFormat("dd-MMM-yy");
Date newDate = (Date) format.parse(date);

Answer 1

I think you are confusing parsing and formatting, try this:

String old_date = "24/04/2012";

DateFormat old_format = new SimpleDateFormat("dd/MM/yyyy");
Date newDate = (Date) old_format.parse(old_date);

DateFormat new_format = new SimpleDateFormat("dd-MMM-yy");
String date = new_format.format(newDate);

System.out.println(date);

Answer 2

您的日期格式应为“ dd / MM / yyyy”

Answer 3

You are doing this backwards:

DateFormat format = new SimpleDateFormat("dd/MM/yyyy");
Date newDate = format.parse(date);

DateFormat formatOutput = new SimpleDateFormat("dd-MMM-yyyy");
String output = formatOutput.format(newDate);

But if what you are doing is passing the date to Oracle, you should really use a PreparedStatement

Answer 4

SimpleDateFormat sdf= new SimpleDateFormat("dd-MM-yy");
DateTime  newDate = sdf.format(date);

Answer 5

尝试DateFormat format = new SimpleDateFormat("dd/MM/yyyy")

Answer 6

Why don't you try using java.sql.Date.

For example:

Date newDate = new java.sql.Date(date.getTime());

So you can just give an generic sql object for date.

Answer 7

The Date class of Java is quite difficult to use in many cases. I recommend the use of the much better Joda Time classes:

DateTimeFormatter oldFormat = DateTimeFormat.forPattern("dd/mm/yyyy");
DateTimeFormatter newFormat = DateTimeFormat.forPattern("dd-MMM-yy");
DateTime dateTime = oldFormat.parseDateTime("24/04/2012");
String newDate = newFormat.print(dateTime);