Java Tutorial/Apache Common/DateFormatUtils

DateFormatUtils: ddMMyyyy

/* 
 * ========================================================================
 * 
 * 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"));
  }
}

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

DateFormatUtils.Format: DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT

/* 
 * ========================================================================
 * 
 * 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));
    }
}

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

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"));

    }
}

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

DateFormatUtils: ISO_DATE_FORMAT

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()));
    }
}

3) ISO_DATE_FORMAT >>>2007-05-09

DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT

/* 
 * ========================================================================
 * 
 * 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));
    }
}

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

DateFormatUtils: SMTP_DATETIME_FORMAT

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()));
    }
}

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

Date UTC Format

/* 
 * ========================================================================
 * 
 * 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()));
  }
}

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

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"));

    }
}

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