|
1 package org.javabb.infra;
2
3 import java.security.MessageDigest  ;
4 import java.util.ArrayList ;
5 import java.util.List ;
6 import java.util.Random ;
7
8 import org.apache.commons.logging.Log;
9 import org.apache.commons.logging.LogFactory;
10
11
26
27
32 public class Utils {
33 private static final Log LOG = LogFactory.getLog(Utils.class);
34
35 private static final Random RANDOM = new Random ();
36
37
42 public static String encrypt(String str) {
43 String sign = null;
44
45 try {
46 MessageDigest md = MessageDigest.getInstance("MD5");
47 md.update(str.getBytes());
48
49 byte[] hash = md.digest();
50 StringBuffer hexString = new StringBuffer ();
51
52 for (int i = 0; i < hash.length; i++) {
53 if ((0xff & hash[i]) < 0x10) {
54 hexString.append("0" + Integer.toHexString((0xFF & hash[i])));
55 } else {
56 hexString.append(Integer.toHexString(0xFF & hash[i]));
57 }
58 }
59
60 sign = hexString.toString();
61 } catch (Exception e) {
62 LOG.error(e.getMessage(), e);
63 }
64 return sign;
65 }
66
67
71 public static String randomNumber() {
72 if (System.currentTimeMillis() % 10000 == 0) {
73 RANDOM.setSeed(System.currentTimeMillis());
74 }
75 return String.valueOf(RANDOM.nextLong());
76 }
77
78
83 public static String validateWebSite(String ws) {
84 if ((ws != null) && (ws.length() > 0)) {
85 ws = ws.replaceAll("http://", "");
86 ws = "http://" + ws;
87
88 return ws;
89 }
90 return "";
91 }
92
93
97 public static String verifyURLs(String text) {
98 final String regex = "([\\s\\n\\r\\t\\.,]|^)((?:http://|https://|ftp://)(?:\\S*))";
99 final String replacement = "$1[url]$2[/url]";
100
101 try {
103 text = text.replaceAll(regex, replacement);
104 } catch (RuntimeException e) {
105 LOG.error(e.getMessage(), e);
106 }
107
108 final String wwwregex = "([\\s\\n\\r\\t\\.,]|^)(www\\.\\S*)";
109 final String wwwreplacement = "$1[url=\"http://$2\"]$2[/url]";
110
111 try {
113 text = text.replaceAll(wwwregex, wwwreplacement);
114 } catch (RuntimeException e) {
115 LOG.error(e.getMessage(), e);
116 }
117
118 final String emailregex = "([\\s\\n\\r\\t\\.,]|^)([\\w-]+(?:\\.[\\w-]+)*@[\\w-]+\\.[\\w-]+(?:\\.[\\w-]+)*)";
119 final String emailreplacement = "$1[url=\"mailto:$2\"]$2[/url]";
120
121 try {
123 text = text.replaceAll(emailregex, emailreplacement);
124 } catch (RuntimeException e) {
125 LOG.error(e.getMessage(), e);
126 }
127
128 return text;
129 }
130
131
135 public static String replaceHTML(String texto) {
136 return texto.replaceAll("<", "<").replaceAll(">", ">");
137 }
138
139
143 public static String getCodeUser(String userName) {
144 String codeUser = userName + System.currentTimeMillis() + Utils.randomNumber();
145 return Utils.encrypt(codeUser);
146 }
147
148
152 public static String avoidNull(String string) {
153
154 return string != null ? string : "";
155 }
156
157
164 public static List indexOf(String text, String key){
165 if(text == null || key == null){
166 return null;
167 }
168 List lst = new ArrayList ();
169 int i = 0;
170 while(true){
171 int occur = text.indexOf(key, ((i>text.length())?text.length():i));
172 if(occur == -1){
173 break;
174 } else {
175 lst.add(new Integer (occur));
176 i= occur + 1;
177 }
178 }
179 return lst;
180 }
181
182
183 public static boolean isBetween(int index, List initCodePos, List finalCodePos){
184 for(int y=0; y<initCodePos.size(); y++){
185 int init = ((Integer ) initCodePos.get(y)).intValue();
186 int limit = ((Integer ) finalCodePos.get(y)).intValue();
187 LOG.info("init:" + init + " limit:" + limit+ " index:" + index);
188 if(index > init && index < limit){
189 return true;
190 }
191 }
192 return false;
193 }
194
195
196 public static void main(String [] args){
197
199 System.out.println(Utils.indexOf("dalt:)on ca:)m..:)", ":)"));
200
201 }
202 }
203 |
Popular Tags |
Java API By Example, From Geeks To Geeks.