public static String hexDecode(final String data) {
        if (StringUtils.isNotBlank(data)) {
            return hexDecode(data.toCharArray());
        }
        return null;
    }
public static String hexDecode ( final String data ) { if ( StringUtils . isNotBlank ( data ) ) { return hexDecode ( data . toCharArray ( ) ) ; } return null ; }
Hex decode string.

@param data the data
@return the string