diff --git a/docs/misc/sign/wbi.md b/docs/misc/sign/wbi.md
index 5f46543..4fc802f 100644
--- a/docs/misc/sign/wbi.md
+++ b/docs/misc/sign/wbi.md
@@ -115,7 +115,7 @@
 
 ## Wbi签名算法实现Demo
 
-该 Demo 提供 [Python](#Python)、[JavaScript](#JavaScript)、[Golang](#Golang)、[C#](#CSharp) 语言
+该 Demo 提供 [Python](#Python)、[JavaScript](#JavaScript)、[Golang](#Golang)、[C#](#CSharp) 语言、[Java](#Java)
 
 ### Python
 
@@ -518,4 +518,62 @@ class Program
 
 ```
 bar=514&baz=1919810&foo=114&wts=1687541921&w_rid=26e82b1b9b3a11dbb1807a9228a40d3b
+```
+
+### Java
+
+需要 `hutool` 依赖
+
+```java
+package com.example.demo;
+
+import cn.hutool.crypto.SecureUtil;
+
+import java.util.*;
+
+public class WbiTest {
+    private static final int[] mixinKeyEncTab = new int[]{
+            46, 47, 18, 2, 53, 8, 23, 32, 15, 50, 10, 31, 58, 3, 45, 35, 27, 43, 5, 49,
+            33, 9, 42, 19, 29, 28, 14, 39, 12, 38, 41, 13, 37, 48, 7, 16, 24, 55, 40,
+            61, 26, 17, 0, 1, 60, 51, 30, 4, 22, 25, 54, 21, 56, 59, 6, 63, 57, 62, 11,
+            36, 20, 34, 44, 52
+    };
+
+    public static String getMixinKey(String imgKey, String subKey) {
+        String s = imgKey + subKey;
+        StringBuilder key = new StringBuilder();
+        for (int i = 0; i < 32; i++) {
+            key.append(s.charAt(mixinKeyEncTab[i]));
+        }
+        return key.toString();
+    }
+
+   public static void main(String[] args) {
+      String imgKey = "653657f524a547ac981ded72ea172057";
+      String subKey = "6e4909c702f846728e64f6007736a338";
+      String mixinKey = getMixinKey(imgKey, subKey);
+      System.out.println(mixinKey);
+      //72136226c6a73669787ee4fd02a74c27
+      //{
+      //     foo: 'one one four',
+      //     bar: '五一四',
+      //     baz: 1919810
+      //}
+      LinkedHashMap<String, Object> map = new LinkedHashMap<>();
+      map.put("foo", "one one four");
+      map.put("bar", "五一四");
+      map.put("baz", 1919810);
+      map.put("wts", System.currentTimeMillis() / 1000);
+      StringJoiner param = new StringJoiner("&");
+      //排序 + 拼接字符串
+      map.entrySet().stream()
+              .sorted(Map.Entry.comparingByKey())
+              .forEach(entry -> param.add(entry.getKey() + "=" + URLUtil.encode(entry.getValue().toString())));
+      String s = param + mixinKey;
+      String wbiSign = SecureUtil.md5(s);
+      System.out.println(wbiSign);
+      String finalParam = param + "&w_rid=" + wbiSign;
+      System.out.println(finalParam);
+   }
+}
 ```
\ No newline at end of file