Unable to parse date using LocalDateTime?

I am trying to parse a date string using DateTimeFormatter. I am receiving the below exception:

Wrong date format 10.10.2020 12:00:00
java.time.format.DateTimeParseException: Text '10.10.2020 12:00:00' could not be parsed at index 2

 String date="10.10.2020 12:00:00";
  
 String dateTimeFormat = "MM/dd/yyyy HH:mm:ss a";
 String exportTimeZone = "UTC";

 DateTimeFormatter format = DateTimeFormatter.ofPattern(dateTimeFormat);

 LocalDateTime impDateTime = LocalDateTime.parse(StringUtils.trim(date), format);
 ZonedDateTime dateInUtc = ZonedDateTime.ofInstant(impDateTime.atZone(ZoneId.of(exportTimeZone)).toInstant(), ZoneId.systemDefault());
 return format.format(dateInUtc);

Any help would be appreciated?

You have used / instead of . in the format. Also, when you are using HH, it means it is 24-hour format, not am/pm and therefore you shouldn't use a with HH in the format. Moreover, your date-time string does not have am/pm in it, so using a in the format will anyway cause an error.

Demo:

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;

public class Main {
	public static void main(String[] args) {
		String dateTime = "10.10.2020 12:00:00";

		// Define the format
		DateTimeFormatter format = DateTimeFormatter.ofPattern("MM.dd.yyyy HH:mm:ss");

		// Parse date-time as using the defined format
		LocalDateTime impDateTime = LocalDateTime.parse(dateTime, format);

		// Get date-time at UTC
		ZonedDateTime dateTimeInUtc = impDateTime.atZone(ZoneId.of("Etc/UTC"));

		// Display
		System.out.println(dateTimeInUtc);
	}
}

Output:

2020-10-10T12:00Z[Etc/UTC]

Let’s read the message:

> java.time.format.DateTimeParseException: Text '10.10.2020 12:00:00' could not be parsed at index 2

Indices are 0-based, so index 2 in 10.10.2020 12:00:00 is where the first dot (period, point) is. So Java is unable to parse that dot. To find out why, let’s look at the corresponding place in the format pattern string

String dateTimeFormat = "MM/dd/yyyy HH:mm:ss a";

So the month, 10, has been successfully parsed and next the formatter expects — a slash. The discrepancy between slash and dot explains the exception.

A further tip: When it gets non-trivial to get the format pattern string for parsing right, try formatting a known date first:

	System.out.println("To be parsed: " + date);
	LocalDateTime knownDateTime = LocalDateTime.of(2020, Month.OCTOBER, 10, 12, 0);
	System.out.println("Formatted:    " + knownDateTime.format(format));

Output in this case:

> To be parsed: 10.10.2020 12:00:00
> Formatted: 10/10/2020 12:00:00 PM

This way of printing it makes it easier to spot the differences between what we’ve got and what the formatter will expect for parsing.