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Generic Dao is a Java package which allows a developer to skip writing DAOs for their persistence objects when they are using Spring and/or Hibernate. The package was originally created by Aaron Zeckoski for the Evaluation System project but was repackaged to make it distributable by request. It is used in the RSF framework (http://www2.caret.cam.ac.uk/rsfwiki/). Note about the BeanUtils provided dependency: BeanUtils is not required if you are not using it in your project. Note about the Hibernate provided dependency: Hibernate is not required if you are not using it in your project.

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/**
 * $Id$
 * $URL$
 * DateUtils.java - genericdao - Sep 16, 2008 11:03:28 PM - azeckoski
 **************************************************************************
 * Copyright (c) 2008 Aaron Zeckoski
 * Licensed under the Apache License, Version 2.0
 * 
 * A copy of the Apache License has been included in this 
 * distribution and is available at: http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 * Aaron Zeckoski (azeckoski @ gmail.com) (aaronz @ vt.edu) (aaron @ caret.cam.ac.uk)
 */

package org.sakaiproject.genericdao.util;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

/**
 * Date conversion utilities, mostly for outputing dates in standard formats
 * 
 * @author Aaron Zeckoski (azeckoski @ gmail.com)
 */
public class DateUtils {

    public static String makeDateRFC2822(Date date) {
        SimpleDateFormat df = new SimpleDateFormat("EEE', 'dd' 'MMM' 'yyyy' 'HH:mm:ss' 'Z", Locale.US);
        return df.format(date);
    }

    public static String makeDateISO8601(Date date) {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ");
        String result = df.format(date);
        // convert YYYYMMDDTHH:mm:ss+HH00 into YYYYMMDDTHH:mm:ss+HH:00
        result = result.substring(0, result.length() - 2) + ":" + result.substring(result.length() - 2);
        return result;
    }
}