01: /*
02: * $Header: /cvsroot/mvnforum/myvietnam/src/net/myvietnam/mvncore/security/RandomGenerator.java,v 1.4 2007/01/15 10:31:17 dungbtm Exp $
03: * $Author: dungbtm $
04: * $Revision: 1.4 $
05: * $Date: 2007/01/15 10:31:17 $
06: *
07: * ====================================================================
08: *
09: * Copyright (C) 2002-2007 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 getRandomMD5_Base64() {
45: String randomString = getRandomString();
46: return Encoder.getMD5_Base64(randomString);
47: }
48:
49: private static String getRandomString() {
50: // generate a long string, idealy at least 128 characters
51: StringBuffer randomString = new StringBuffer(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 args[]) {
60: System.out
61: .println("getRandomString = " + getRandomString());
62: System.out.println("getRandomMD5_Base64 = "
63: + getRandomMD5_Base64());
64: }
65: }
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