Index: lutinutil/src/java/org/codelutin/util/StringUtil.java
diff -u lutinutil/src/java/org/codelutin/util/StringUtil.java:1.25 lutinutil/src/java/org/codelutin/util/StringUtil.java:1.26
--- lutinutil/src/java/org/codelutin/util/StringUtil.java:1.25	Mon Dec 17 23:31:16 2007
+++ lutinutil/src/java/org/codelutin/util/StringUtil.java	Tue Dec 18 00:35:51 2007
@@ -22,9 +22,9 @@
  *
  * @author POUSSIN Benjamin <bpoussin@free.fr>
  * Copyright Code Lutin
- * @version $Revision: 1.25 $
+ * @version $Revision: 1.26 $
  *
- * Mise a jour: $Date: 2007-12-17 23:31:16 $
+ * Mise a jour: $Date: 2007-12-18 00:35:51 $
  * par : $Author: tchemit $
  */
 package org.codelutin.util;
@@ -507,26 +507,41 @@
      */
     public static String convertToConstantName(String name) {
         StringBuilder sb = new StringBuilder();
+        char lastChar=0;
         for (int i = 0, j = name.length(); i < j; i++) {
             char c = name.charAt(i);
             if (Character.isDigit(c)) {
                 sb.append(c);
+                lastChar = c;
                 continue;
             }
             if (!Character.isLetter(c)) {
-                  if (c=='_') {
-                      sb.append('_');
-                  }
+                    if (lastChar != '_') {
+                        sb.append('_');
+                    }
+                lastChar='_';
                 continue;
             }
             if (Character.isUpperCase(c)) {
-                sb.append('_').append(c);
+                if (!Character.isUpperCase(lastChar)&&lastChar!='_') {
+                    sb.append('_');
+                }
+                sb.append(c);
             } else {
                 sb.append(Character.toUpperCase(c));
             }
+            lastChar=c;
         }
         String result = sb.toString();
-        return result.startsWith("_") ? result.substring(1) : result;
+        // clean tail
+        while (!result.isEmpty() && result.endsWith("_")) {
+            result = result.substring(0,result.length()-1);
+        }
+        // clean head
+        while (!result.isEmpty() && result.startsWith("_")) {
+            result = result.substring(1);
+        }
+        return result;
     }
 
 }