RtMallSignMd5Utils.java
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package com.diligrp.cashier.mall.util;
import com.diligrp.cashier.shared.util.JsonUtils;
import com.fasterxml.jackson.core.type.TypeReference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.security.MessageDigest;
import java.util.*;
/**
* @ClassName SignMd5Utils.java
* @author dengwei
* @version 1.0.0
* @Description
* 签名算法
* 参考大润发定义：https://shopex.yuque.com/hl0rrx/vlp0m4/kmcazgnimg28d8ih?singleDoc#
*/
public class RtMallSignMd5Utils {
private static final Logger log = LoggerFactory.getLogger(RtMallSignMd5Utils.class);
/**
* 生成签名
*
*/
public static String generateSign(Object data, String appSecret) {
Map<String, Object> params = JsonUtils.convertValueV2(data, new TypeReference<>() {
});
// 1. 过滤 null，转换 boolean，递归规范化并排序
String normalized = normalizeAndSort(params);
log.info("normalize: {}", normalized);
// 2. 拼接私钥
String signSource = appSecret + normalized + appSecret;
log.info("signSource: {}", signSource);
// 3. MD5 + 大写
String sign = md5ToUpper(signSource);
log.info("sign: {}", sign);
return sign;
}
/**
* 递归规范化并排序，返回拼接字符串（无分隔符）
*/
@SuppressWarnings("unchecked")
private static String normalizeAndSort(Object obj) {
switch (obj) {
case null -> {
return "";
}
case Map map1 -> {
Map<String, Object> map = (Map<String, Object>) obj;
// 过滤 null，并转换 boolean
Map<String, Object> filtered = new LinkedHashMap<>();
for (Map.Entry<String, Object> entry : map.entrySet()) {
if (entry.getValue() == null) {
continue;
}
Object val = convertBoolean(entry.getValue());
filtered.put(entry.getKey(), val);
}
// 按 key 字典序排序
List<String> sortedKeys = new ArrayList<>(filtered.keySet());
Collections.sort(sortedKeys); // 字典序
StringBuilder sb = new StringBuilder();
for (String key : sortedKeys) {
sb.append(key).append(normalizeAndSort(filtered.get(key)));
}
return sb.toString();
}
case List list1 -> {
List<Object> list = (List<Object>) obj;
// 转为 Map<String, Object>，key 为索引字符串
Map<String, Object> indexMap = new LinkedHashMap<>();
for (int i = 0; i < list.size(); i++) {
indexMap.put(String.valueOf(i), list.get(i));
}
// 递归处理（会自动过滤 null、转换 boolean、排序 key）
return normalizeAndSort(indexMap);
// 递归处理（会自动过滤 null、转换 boolean、排序 key）
}
case Object[] array -> {
// 处理数组类型，转换为 Map 并递归处理
Map<String, Object> arrayMap = new LinkedHashMap<>();
for (int i = 0; i < array.length; i++) {
arrayMap.put(String.valueOf(i), array[i]);
}
return normalizeAndSort(arrayMap);
}
default -> {
}
}
// 基本类型：转字符串
return obj.toString();
}
/**
* 转换 Boolean 为 "1"/"0"
*/
private static Object convertBoolean(Object obj) {
if (obj instanceof Boolean) {
return (Boolean) obj ? "1" : "0";
}
return obj;
}
/**
* MD5 并转大写
*/
private static String md5ToUpper(String input) {
try {
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] digest = md.digest(input.getBytes("UTF-8"));
StringBuilder sb = new StringBuilder();
for (byte b : digest) {
sb.append(String.format("%02x", b));
}
return sb.toString().toUpperCase();
} catch (Exception e) {
throw new RuntimeException("MD5 failed", e);
}
}
public static void main(String[] args) {
// 构建顶层参数 Map
Map<String, Object> params = new HashMap<>();
params.put("app_key", "221zzcwxee30nucj0rx1");
params.put("timestamp", 1734351194L); // 使用 Long 避免溢出
params.put("nonce_str", "cvwEv8JRNzHd3eaV");
params.put("order_id", "1234567890"); // order_id 可以是字符串或数字，这里按字符串处理更安全
// 构建 item_list
List<Map<String, Object>> itemList = new ArrayList<>();
for (int i = 1; i <= 11; i++) {
Map<String, Object> subOrder = new HashMap<>();
subOrder.put("sub_order_id", i);
subOrder.put("price", 100);
itemList.add(subOrder);
}
params.put("item_list", itemList);
// 打印验证（可选）
log.info("Params: {}", JsonUtils.toJsonString(params));
String sign = generateSign(params, "ho7ygrsrwged4zwhwpbadtdgzugmulez");
log.info("Sign: {}", sign);
}
}