randomsampleutil.java

一个比较不错的java分页标签,有源代码,开发者 可以学习学习

/**
 * Licensed under the Artistic License; you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://displaytag.sourceforge.net/license.html
 *
 * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */
package org.displaytag.sample;

import java.util.Calendar;
import java.util.Date;
import java.util.Random;


/**
 * Utility class used to get random word and sentences used in examples.
 * @author Fabrizio Giustina
 * @version $Revision$ ($Author$)
 */
public final class RandomSampleUtil
{

    /**
     * list of words.
     */
    private static String[] words = new String[]{"Lorem", //$NON-NLS-1$
        "ipsum", //$NON-NLS-1$
        "dolor", //$NON-NLS-1$
        "sit", //$NON-NLS-1$
        "amet", //$NON-NLS-1$
        "consetetur", //$NON-NLS-1$
        "sadipscing", //$NON-NLS-1$
        "elitr", //$NON-NLS-1$
        "sed", //$NON-NLS-1$
        "diam", //$NON-NLS-1$
        "nonumy", //$NON-NLS-1$
        "eirmod", //$NON-NLS-1$
        "tempor", //$NON-NLS-1$
        "invidunt", //$NON-NLS-1$
        "ut", //$NON-NLS-1$
        "labore", //$NON-NLS-1$
        "et", //$NON-NLS-1$
        "dolore", //$NON-NLS-1$
        "magna", //$NON-NLS-1$
        "aliquyam", //$NON-NLS-1$
        "erat", //$NON-NLS-1$
        "sed", //$NON-NLS-1$
        "diam", //$NON-NLS-1$
        "voluptua", //$NON-NLS-1$
        "At", //$NON-NLS-1$
        "vero", //$NON-NLS-1$
        "eos", //$NON-NLS-1$
        "et", //$NON-NLS-1$
        "accusam", //$NON-NLS-1$
        "et", //$NON-NLS-1$
        "justo", //$NON-NLS-1$
        "duo", //$NON-NLS-1$
        "dolores", //$NON-NLS-1$
        "et", //$NON-NLS-1$
        "ea", //$NON-NLS-1$
        "rebum", //$NON-NLS-1$
        "Stet", //$NON-NLS-1$
        "clita", //$NON-NLS-1$
        "kasd", //$NON-NLS-1$
        "gubergren", //$NON-NLS-1$
        "no", //$NON-NLS-1$
        "sea", //$NON-NLS-1$
        "takimata", //$NON-NLS-1$
        "sanctus", //$NON-NLS-1$
        "est"}; //$NON-NLS-1$

    /**
     * random number producer.
     */
    private static Random random = new Random();

    /**
     * utility class, don't instantiate.
     */
    private RandomSampleUtil()
    {
        super();
    }

    /**
     * returns a random word.
     * @return random word
     */
    public static String getRandomWord()
    {
        return words[random.nextInt(words.length)];
    }

    /**
     * returns a random sentence.
     * @param wordNumber number of word in the sentence
     * @return random sentence made of <code>wordNumber</code> words
     */
    public static String getRandomSentence(int wordNumber)
    {
        StringBuffer buffer = new StringBuffer(wordNumber * 12);

        int j = 0;
        while (j < wordNumber)
        {
            buffer.append(getRandomWord());
            buffer.append(" "); //$NON-NLS-1$
            j++;
        }
        return buffer.toString();
    }

    /**
     * returns a random email.
     * @return random email
     */
    public static String getRandomEmail()
    {
        return getRandomWord() + "@" + getRandomWord() + ".com"; //$NON-NLS-1$ //$NON-NLS-2$
    }

    /**
     * returns a random date.
     * @return random date
     */
    public static Date getRandomDate()
    {

        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.DATE, 365 - random.nextInt(730));
        return calendar.getTime();
    }
}