From 13b31b2ca2a5f8600002a042b536c9d5529842e3 Mon Sep 17 00:00:00 2001
From: Junjie <fallin.jie@qq.com>
Date: 星期一, 09 三月 2026 19:21:18 +0800
Subject: [PATCH] #

---
 src/main/java/com/core/utils/SignUtils.java |   30 ++++++++++++++++++++++++++++++
 1 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/src/main/java/com/core/utils/SignUtils.java b/src/main/java/com/core/utils/SignUtils.java
new file mode 100644
index 0000000..cbb46b6
--- /dev/null
+++ b/src/main/java/com/core/utils/SignUtils.java
@@ -0,0 +1,30 @@
+package com.core.utils;
+
+import com.core.common.Cools;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+public class SignUtils {
+
+    public static String sign(Map<String, Object> param, String key) {
+        List<String> list = new ArrayList<>();
+        for (String mapKey : param.keySet()) {
+            Object value = param.get(mapKey);
+            if ("sign".equals(mapKey) || value == null) {
+                continue;
+            }
+            list.add(mapKey + "=" + value + "&");
+        }
+        String[] arr = list.toArray(new String[0]);
+        Arrays.sort(arr, String.CASE_INSENSITIVE_ORDER);
+        StringBuilder builder = new StringBuilder();
+        for (String item : arr) {
+            builder.append(item);
+        }
+        String text = builder.toString() + "key=" + key;
+        return Cools.md5(text).toUpperCase();
+    }
+}

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