With this example we are going to demonstrate how to make Date and Time formatting. We are using the org.apache.commons.lang3.time.DateFormatUtils class, that provides Date and time formatting utilities and constants. It uses the org.apache.commons.lang3.time.FastDateFormat class, that is a fast and thread-safe version of SimpleDateFormat. In short, to format Date and Time you should:
- Create a new Date object.
- Use
ISO_DATETIME_FORMATfield ofDateFormatUtilsto get an ISO8601 formatter for date-time without time zone. It is aFastDateFormatobject. - Use
ISO_DATETIME_TIME_ZONE_FORMATfield of DateFormatUtils to get an ISO8601 formatter for date-time with time zone. It is aFastDateFormatobject. - Use
SMTP_DATETIME_FORMATfield that is the SMTP (and probably other) date headers. It returns aFastDateFormatobject. - Use
format(Date date)method ofFastDateFormatfor all formatters above to format the Date object using a GregorianCalendar.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.util.Date;
import org.apache.commons.lang3.time.DateFormatUtils;
public class DateTimeFormat {
public static void main(String[] args) {
Date date = new Date();
// Without time zone (yyyy-MM-dd'T'HH:mm:ss)
String timestamp = DateFormatUtils.ISO_DATETIME_FORMAT.format(date);
System.out.println("Date/time 1 = " + timestamp);
// With time zone (yyyy-MM-dd'T'HH:mm:ssZZ)
timestamp = DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.format(date);
System.out.println("Date/time 2 = " + timestamp);
// US locale (EEE, dd MMM yyyy HH:mm:ss Z)
timestamp = DateFormatUtils.SMTP_DATETIME_FORMAT.format(date);
System.out.println("Date/time 3 = " + timestamp);
}
}
Output:
Date/time 1 = 2012-07-06T18:16:31
Date/time 2 = 2012-07-06T18:16:31+03:00
Date/time 3 = Fri, 06 Jul 2012 18:16:31 +0300
This was an example of how to make Date and Time formatting in Java.
