添加Wbi签名的Java实现 (#722)

docs/misc/sign/wbi.md

@@ -422,3 +422,60 @@ func main() {
 	fmt.Println(string(body))
 }
 ```
+### 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: '114',
+        //     bar: '514',
+        //     zab: 1919810
+        //}
+        LinkedHashMap<String, Object> map = new LinkedHashMap<>();
+        map.put("foo", "114");
+        map.put("bar", "514");
+        map.put("zab", 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() + "=" + 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);
+    }
+}
+```