public static String getAsciiSort(Map<String, Object> map) {
    List<Entry<String, Object>> infoIds = new ArrayList<Entry<String, Object>>(map.entrySet());
    // 對所有傳入引數按照欄位名的 ASCII 碼從小到大排序（字典序）
    Collections.sort(infoIds, new Comparator<Entry<String, Object>>() {
 
      public int compare(Map.Entry<String, Object> o1, Map.Entry<String, Object> o2) {
        return ((String) o1.getKey()).compareToIgnoreCase((String) o2.getKey());
      }
    });
}