问题
I am storing the current date in SQLite db using the variable CURRENT_DATE. I found that the date format used is yyyy-mm-dd
in the same. I want to parse the date in the code but I get this error:
java.lang.IllegalArgumentException: Parse error: at java.util.Date.parseError
The code is shown below:
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-mm-dd");
String formattedTaskDate = dateFormat.format(new Date(dateStoredAsStringFetchedFromDB));
Date d = new Date(formattedTaskDate);
At first, I am fetching the date from the database and storing it in a String variable (because date is stored as TEXT in SQLite) and then I am performing the above operations but I get the exception as parseError.
How can I solve this issue?
回答1:
It seems your date format is wrong. You should take note that the uppercase M
is used to represent months and the lowercase m
is used for minutes. To solve this just change your yyyy-mm-dd
to yyy-MM-dd
.
Now if you want to change that format in the future you may do so by doing something like this :
try {
DateFormat inputFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date input = inputFormat.parse(date);
DateFormat outputFormat = new SimpleDateFormat(" EEEE MMMM-dd-yyyy ", Locale.ENGLISH);
String finaldate = outputFormat.format(input);
txtDate.setText(finaldate); <-- just an example of displaying the date
}catch (Exception ex) {
Alerts.CatchError(getBaseContext(), ex.toString());
}
This will display the initially stored date of 2015-04-25 12:08:34
( yyyy-MM-dd HH:mm:ss ) as Friday April-25-2015
. You can of course change this to your liking as well, just refer to the documentation Ankit has kindly linked for you.
回答2:
Format is wrong, try this:
String string = dateStoredAsStringFetchedFromDB;
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = format.parse(string);
Documentation.
回答3:
Could you please paste the value of dateStoredAsStringFetchedFromDB
as returned from the database ?
It's probable that the returned value does not match the yyyy-mm-dd format.
Also please note that from the javadoc (https://developer.android.com/reference/java/text/SimpleDateFormat.html) the 'm' pattern denotes minutes and not month as you seem to expect.
来源:https://stackoverflow.com/questions/29852231/java-lang-illegalargumentexception-parse-error-date-format-error