<init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>encodingRules</param-name>
      <param-value>sjis:Shift_JIS,eucjp:EUC-JP</param-value>
    </init-param>
  </filter>

  <filter>
    <filter-name>rateLimitFilter</filter-name>

 */
public class EncodingFilter implements Filter {
    /** Configuration key for encoding rules mapping */
    public static final String ENCODING_MAP = "encodingRules";

    /** Map of path patterns to their corresponding character encodings */
    protected Map<String, String> encodingMap = new ConcurrentHashMap<>();

    /** Default character encoding to use for requests */