api-servlet/src/main/java/org/ocpsoft/rewrite/servlet/util/QueryStringBuilder.java
public static String extractQuery(String url)
   {
      if (url != null)
      {
         int index = url.indexOf('?');
         if (index >= 0)
         {
            url = url.substring(index + 1);
         }
      }
      return url;
   }
public static String extractQuery(String url)
   {
      if (url != null)
      {
         int index = url.indexOf('?');
         if (index >= 0)
         {
            url = url.substring(index + 1);
         }
      }
      return url;
   }
Get the query string portion of the given URL. If no query string separator character '?' can be found, return the
string unchanged.