Java Tutorial/Apache Common/DateFormatUtils

DateFormatUtils: ddMMyyyy

   <source lang="java">

/*

* ========================================================================
* 
* Copyright 2005 Tim O"Brien.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* 
*   http://www.apache.org/licenses/LICENSE-2.0
* 
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* 
* ========================================================================
*/

import java.util.Date; import org.apache.rumons.lang.time.DateFormatUtils; public class MainClass {

 public static void main(String[] pArgs) throws Exception {
   //Format Date into dd-MM-yyyy
   System.out.println("1) dd-MM-yyyy >>>" +
       DateFormatUtils.format(new Date(), "dd-MM-yyyy"));
 }

}</source>

1) dd-MM-yyyy >>>08-05-2007

DateFormatUtils.Format: DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT

   <source lang="java">

/*

* ========================================================================
* 
* Copyright 2005 Tim O"Brien.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* 
*   http://www.apache.org/licenses/LICENSE-2.0
* 
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* 
* ========================================================================
*/

import java.util.Calendar; import java.util.Date; import java.util.Iterator; import org.apache.rumons.lang.time.DateFormatUtils; import org.apache.rumons.lang.time.DateUtils; import org.apache.rumons.lang.time.FastDateFormat; public class MainClass {

   public static void main(String[] pArgs) throws Exception {
     FastDateFormat sdf = DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT;
     Date now = new Date();
     Date nearestHour = DateUtils.round(now, Calendar.HOUR);
     Date nearestMonth = DateUtils.round(now, Calendar.MONTH);
     Date nearestYear = DateUtils.round(now, Calendar.YEAR);
     System.out.println("now: " + sdf.format(now));
     System.out.println("round hour: " + sdf.format(nearestHour));
     System.out.println("round month: " + sdf.format(nearestMonth));
     System.out.println("round year: " + sdf.format(nearestYear));
   }

}</source>

now: 2007-05-08T15:24:52-07:00
round hour: 2007-05-08T15:00:00-07:00
round month: 2007-05-01T00:00:00-07:00
round year: 2007-01-01T00:00:00-08:00

DateFormatUtils: formatUTC

   <source lang="java">

import java.util.Date; import org.apache.rumons.lang.time.DateFormatUtils; public class MainClass {

   public static void main(String[] args) {
     //Format milliseconds in long using UTC timezone
     System.out.println("5) MM/dd/yy HH:mm >>>" +
         DateFormatUtils.formatUTC(System.currentTimeMillis(),
             "MM/dd/yy HH:mm"));

   }

}</source>

5) MM/dd/yy HH:mm >>>05/09/07 19:54

DateFormatUtils: ISO_DATE_FORMAT

   <source lang="java">

import java.util.Date; import org.apache.rumons.lang.time.DateFormatUtils; public class MainClass {

   public static void main(String[] args) {
     //Format Date into ISO_DATE_FORMAT
     System.out.println("3) ISO_DATE_FORMAT >>>" +
         DateFormatUtils.ISO_DATE_FORMAT.format(new Date()));
   }

}</source>

3) ISO_DATE_FORMAT >>>2007-05-09

DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT

   <source lang="java">

/*

* ========================================================================
* 
* Copyright 2005 Tim O"Brien.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* 
*   http://www.apache.org/licenses/LICENSE-2.0
* 
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* 
* ========================================================================
*/

import java.util.Calendar; import java.util.Date; import java.util.Iterator; import org.apache.rumons.lang.time.DateFormatUtils; import org.apache.rumons.lang.time.DateUtils; import org.apache.rumons.lang.time.FastDateFormat; public class MainClass {

   public static void main(String[] pArgs) throws Exception {
     Date now = new Date();
     System.out.println(DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.format(now));
   }

}</source>

2007-05-08T15:28:22-07:00

DateFormatUtils: SMTP_DATETIME_FORMAT

   <source lang="java">

import java.util.Date; import org.apache.rumons.lang.time.DateFormatUtils; public class MainClass {

   public static void main(String[] args) {
     //Format Date into SMTP_DATETIME_FORMAT
     System.out.println("2) SMTP_DATETIME_FORMAT >>>" +
         DateFormatUtils.SMTP_DATETIME_FORMAT.format(new Date()));
   }

}</source>

2) SMTP_DATETIME_FORMAT >>>Wed, 09 May 2007 12:52:42 -0700

Date UTC Format

   <source lang="java">

/*

* ========================================================================
* 
* Copyright 2005 Tim O"Brien.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* 
*   http://www.apache.org/licenses/LICENSE-2.0
* 
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* 
* ========================================================================
*/

import java.util.Date; import org.apache.rumons.lang.time.DateFormatUtils; public class MainClass {

 public static void main(String[] pArgs) throws Exception {
   Date now = new Date();
   System.out.println("now: " + DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.format(now));
   System.out.println("UTC Time: "
       + DateFormatUtils
           .formatUTC(now, DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.getPattern()));
 }

}</source>

now: 2007-05-08T16:05:57-07:00
UTC Time: 2007-05-08T23:05:57+00:00

Using DateFormatUtils.format to format current time to format: MMM dd yy HH:mm

   <source lang="java">

import java.util.Date; import org.apache.rumons.lang.time.DateFormatUtils; public class MainClass {

   public static void main(String[] args) {
     //Format milliseconds in long
     System.out.println("4) MMM dd yy HH:mm >>>" +
         DateFormatUtils.format(System.currentTimeMillis(), "MMM dd yy HH:mm"));

   }

}</source>

4) MMM dd yy HH:mm >>>May 09 07 12:54