The encoding and decoding utility classes in various formats share the of hex decoding base64 encoding

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Hex;
import org.apache.commons.lang.StringEscapeUtils;

public class EncodeUtils {
 private static final String DEFAULT_URL_ENCODING = "UTF-8";
 
 
 
 public static byte[] hexDecode(String input) {
  try {
   return Hex.decodeHex(input.toCharArray());
  } catch (DecoderException e) {
   throw new IllegalStateException("Hex Decoder exception", e);
  }
 }
 
 public static String base64Encode(byte[] input) {
  return new String(Base64.encodeBase64(input));
 }
 /**
  * Base64 coding , URL security ( will Base64 In the URL Illegal character �?,/= To other characters ,  see RFC3548).
  */
 public static String base64UrlSafeEncode(byte[] input) {
  return Base64.encodeBase64URLSafeString(input);
 }
 
 public static byte[] base64Decode(String input) {
  return Base64.decodeBase64(input);
 }
 
 public static String urlEncode(String input) {
  try {
   return URLEncoder.encode(input, DEFAULT_URL_ENCODING);
  } catch (UnsupportedEncodingException e) {
   throw new IllegalArgumentException("Unsupported Encoding Exception", e);
  }
 }
 
 public static String urlDecode(String input) {
  try {
   return URLDecoder.decode(input, DEFAULT_URL_ENCODING);
  } catch (UnsupportedEncodingException e) {
   throw new IllegalArgumentException("Unsupported Encoding Exception", e);
  }
 }
 
 public static String htmlEscape(String html) {
  return StringEscapeUtils.escapeHtml(html);
 }
 
 public static String htmlUnescape(String htmlEscaped) {
  return StringEscapeUtils.unescapeHtml(htmlEscaped);
 }
 
 public static String xmlEscape(String xml) {
  return StringEscapeUtils.escapeXml(xml);
 }
 
 public static String xmlUnescape(String xmlEscaped) {
  return StringEscapeUtils.unescapeXml(xmlEscaped);
 }
}