Exemple de décodage d'une URL

/**
    * This method decodes the URL encoded format.
    * i.e. %XX -> char and + to space
    * @param decode The String to decode.
    * @return The decoded String.
    */
   protected String decodeURL(String decode) {
      StringBuffer decoded = new StringBuffer();
      char nextChar;
      String encString;
      Integer encInteger;
 
      // Go through the String character by character.
      for(int index=0; index < decode.length(); index++) {
         // Get the next character in the String.
         nextChar = decode.charAt(index);
         // If the character is +, then convert it to
         // a space.
         if (nextChar == '+') {
            decoded.append(" ");
         }
         // If the character is a %, then the next two
         // characters store the value of the encoded
         // character.
         else if (nextChar == '%') {
            // Create an Integer object containing the
            // integer value of the next two characters
            // in the string, assuming a base 16 notation.
            encInteger = Integer.valueOf(
               decode.substring(index+1,index+3),URL_BASE);
            // Increment our counter by 2 - we just read
            // two characters.
            index += 2;
            // Return the int value within the Integer
            // and then cast that into a char type.
            nextChar = (char)encInteger.intValue();
            // Add the coded character.
            decoded.append(nextChar);
         }
         // Otherwise, just add the character.
         else {
            decoded.append(nextChar);
         }
      }
      // Return the decoded string.
      return decoded.toString();
   }
}