Issue with DateTimeParseException when using STRICT resolver style

问题

I am trying to parse a date string using the following pattern: yyMMdd and the STRICT resolver as follows:

DateTimeFormatter formatter = DateTimeFormatter.ofPattern(dateFormat).withResolverStyle(ResolverStyle.STRICT);
LocalDate.parse(expiryDate, formatter);

I get the following DateTimeParseException:

java.time.format.DateTimeParseException: Text '160501' could not be parsed: Unable to obtain LocalDate from TemporalAccessor: {YearOfEra=2016, MonthOfYear=5, DayOfMonth=1},ISO of type java.time.format.Parsed

When I swith to the default resolve style, i.e. ResolverStyle.SMART it allows such dates as 30th of February.

Can someone please help?

回答1:

The strict resolver requires an era to go with YearOfEra. Change your pattern to use "u" instead of "y" and it will work, ie. "uuMMdd".

来源：https://stackoverflow.com/questions/41103603/issue-with-datetimeparseexception-when-using-strict-resolver-style