Map集合按照ASCII碼從小到大(字典序)排序--JAVA
阿新 • • 發佈:2019-01-24
以下程式碼:將傳參按照ASCII 碼字典序排序,並將生成的字串進行MD5加密
/** * 生成簽名 * @param map * @return */ public static String getSign(Map<String, String> map) { String result = ""; try { List<Map.Entry<String, String>> infoIds = new ArrayList<Map.Entry<String, String>>(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<Map.Entry<String, String>>() { public int compare(Map.Entry<String, String> o1, Map.Entry<String, String> o2) { return (o1.getKey()).toString().compareTo(o2.getKey()); } }); // 構造簽名鍵值對的格式 StringBuilder sb = new StringBuilder(); for (Map.Entry<String, String> item : infoIds) { if (item.getKey() != null || item.getKey() != "") { String key = item.getKey(); String val = item.getValue(); if (!(val == "" || val == null)) { sb.append(key + ":" + val + ":"); } } } // sb.append(PropertyManager.getProperty("SIGNKEY")); result = sb.toString(); //進行MD5加密 result = DigestUtils.md5Hex(result).toUpperCase(); } catch (Exception e) { return null; } return result; }