code: public static Format getDateFormatter(final String pattern) {
  		Format format = JKFormatUtil.formatMap.get(pattern);
  		if (format == null) {
  			format = new SimpleDateFormat(pattern);
  			JKFormatUtil.formatMap.put(pattern, format);
  		}
  		return format;
  	}
docs: Gets the date formatter.
  
  @param pattern the pattern
  @return the date formatter