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Java > Open Source Codes > net > myvietnam > mvncore > security > RandomGenerator


1 /*
2  * $Header: /cvsroot/mvnforum/myvietnam/src/net/myvietnam/mvncore/security/RandomGenerator.java,v 1.3 2006/04/15 02:59:19 minhnn Exp $
3  * $Author: minhnn $
4  * $Revision: 1.3 $
5  * $Date: 2006/04/15 02:59:19 $
6  *
7  * ====================================================================
8  *
9  * Copyright (C) 2002-2006 by MyVietnam.net
10  *
11  * All copyright notices regarding MyVietnam and MyVietnam CoreLib
12  * MUST remain intact in the scripts and source code.
13  *
14  * This library is free software; you can redistribute it and/or
15  * modify it under the terms of the GNU Lesser General Public
16  * License as published by the Free Software Foundation; either
17  * version 2.1 of the License, or (at your option) any later version.
18  *
19  * This library is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22  * Lesser General Public License for more details.
23  *
24  * You should have received a copy of the GNU Lesser General Public
25  * License along with this library; if not, write to the Free Software
26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27  *
28  * Correspondence and Marketing Questions can be sent to:
29  * info at MyVietnam net
30  *
31  * @author: Minh Nguyen
32  * @author: Mai Nguyen
33  */
34 package net.myvietnam.mvncore.security;
35
36 import org.apache.commons.lang.RandomStringUtils;
37
38 public class RandomGenerator {
39
40     // prevent instantiation
41 private RandomGenerator() {
42     }
43
44     public static String JavaDoc getRandomMD5_Base64() {
45         String JavaDoc randomString = getRandomString();
46         return Encoder.getMD5_Base64(randomString);
47     }
48
49     private static String JavaDoc getRandomString() {
50         // generate a long string, idealy at least 128 characters
51 StringBuffer JavaDoc randomString = new StringBuffer JavaDoc(128);
52         randomString.append(String.valueOf(System.currentTimeMillis()));
53         randomString.append(RandomStringUtils.randomAlphanumeric(30));
54         randomString.append(RandomStringUtils.randomNumeric(30));
55         randomString.append(String.valueOf(System.currentTimeMillis()));
56         return randomString.toString();
57     }
58
59     public static void main (String JavaDoc args[]) {
60         System.out.println("getRandomString = " + getRandomString());
61         System.out.println("getRandomMD5_Base64 = " + getRandomMD5_Base64());
62     }
63 }
64
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