问题
I'm trying to parse date time string to LocalDateTime. However if I send month with all caps its thorwning an error, is there any workaround. Here is the below code
@Test
public void testDateFormat(){
DateTimeFormatter formatter= DateTimeFormatter.ofPattern("dd-MMM-yyyy HH:mm:ss");
LocalDateTime dateTime = LocalDateTime.parse("04-NOV-2015 16:00:00", formatter); //if I send month Nov it works
System.out.println(dateTime.getYear());
}
The Same works for simpleDateFormat
@Test
public void testSimpleDateTime() throws ParseException{
SimpleDateFormat format = new SimpleDateFormat("dd-MMM-yyyy HH:mm:ss");
Date dateTime = format.parse("04-NOV-2015 16:00:00");
System.out.println(dateTime.getTime());
}
回答1:
Answering this question because most of us might not know JSR 310. Hence would search for java 8 LocalDateTime ignore case.
@Test
public void testDateFormat(){
DateTimeFormatter formatter= new DateTimeFormatterBuilder().parseCaseInsensitive().appendPattern("dd-MMM-yyyy HH:mm:ss").toFormatter();
LocalDateTime dateTime = LocalDateTime.parse("04-NOV-2015 16:00:00", formatter);
System.out.println(dateTime.getYear());
}
**UPDATE*
To locale
DateTimeFormatter parser = new DateTimeFormatterBuilder().parseCaseInsensitive() .appendPattern("dd-MMM-yyyy HH:mm:ss.SS").toFormatter(Locale.ENGLISH)
来源：https://stackoverflow.com/questions/62073296/why-pattern-of-datetimeformat-is-needed-to-avoid-this-causing-a-datetimeparseexc