diff --git a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/institution/EvalProcessControlExecutor.java b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/institution/EvalProcessControlExecutor.java
index 0bbc25e..e6f5ee3 100644
--- a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/institution/EvalProcessControlExecutor.java
+++ b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/institution/EvalProcessControlExecutor.java
@@ -1,5 +1,7 @@
 package org.qinan.safetyeval.app.executor.institution;
 
+import cn.hutool.core.io.FileUtil;
+import cn.hutool.core.util.StrUtil;
 import cn.hutool.json.JSONArray;
 import cn.hutool.json.JSONObject;
 import cn.hutool.json.JSONUtil;
@@ -415,17 +417,13 @@ public class EvalProcessControlExecutor implements EvalProcessControlApi {
     }
 
     private String extractFileName(String url) {
-        if (!StringUtils.hasText(url)) {
-            return "";
+        if (StrUtil.isBlank(url)) {
+            return StrUtil.EMPTY;
         }
-        String noQuery = url;
-        int queryIdx = noQuery.indexOf('?');
-        if (queryIdx > 0) {
-            noQuery = noQuery.substring(0, queryIdx);
-        }
-        int slashIdx = noQuery.lastIndexOf('/');
-        String name = slashIdx >= 0 ? noQuery.substring(slashIdx + 1) : noQuery;
-        return StringUtils.hasText(name) ? name : url;
+        // 去掉查询参数后取最后一段路径作为文件名
+        String noQuery = StrUtil.subBefore(url, "?", false);
+        String name = FileUtil.getName(noQuery);
+        return StrUtil.isBlank(name) ? url : name;
     }
 
     private EvalReportEntity buildReport(EvalProjectEntity project) {