fix: [kkfiew]

src/main/java/com/guwan/backend/util/KKviewUrlUtil.java

@@ -0,0 +1,28 @@
+package com.guwan.backend.util;
+
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Base64;
+
+public class KKviewUrlUtil {
+    public static String toKKViewUrl(String url) {
+
+        // Step 1: Base64 编码
+        String base64Url = Base64.getEncoder().encodeToString(url.getBytes(StandardCharsets.UTF_8));
+
+        // Step 2: URL 编码（因为 base64 可能包含 +、/ 等特殊字符）
+        String encodedUrl = URLEncoder.encode(base64Url, StandardCharsets.UTF_8);
+
+        // Step 3: 拼接最终预览地址
+        return "http://localhost:8012/onlinePreview?url=" + encodedUrl;
+
+    }
+
+
+    public static void main(String[] args) {
+        //云服务器
+        //全局管理ip
+        String kkViewUrl = toKKViewUrl("http://10.129.41.185:9000/demo/ppt/3d4ae65d-1af3-41a5-9956-5fbe6271d960.pptx");
+        System.out.println(kkViewUrl);
+    }
+}