以下代碼:將傳參按照ASCII 碼字典序排序,並將生成的字符串進行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());
// 對所有傳入參數按照字段名的 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;
}