From e15423b9f728565dd66f8a816287f64903fd4a93 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=AB=98=E5=A4=A7?= <1504665037@qq.com>
Date: Wed, 28 Jan 2026 09:19:56 +0800
Subject: [PATCH] =?UTF-8?q?fix:=E5=A2=9E=E5=8A=A0=E8=87=AA=E5=8A=A8?=
 =?UTF-8?q?=E8=88=AA=E7=BA=BF=E5=90=8D=E7=A7=B0=E7=9A=84=E9=80=BB=E8=BE=91?=
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---
 .../common/core/utils/file/FileUtils.java     | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/file/FileUtils.java b/ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/file/FileUtils.java
index 78e5410..b90b0b6 100644
--- a/ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/file/FileUtils.java
+++ b/ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/file/FileUtils.java
@@ -250,4 +250,57 @@ public class FileUtils
         String encode = URLEncoder.encode(s, StandardCharsets.UTF_8.toString());
         return encode.replaceAll("\\+", "%20");
     }
+
+    /**
+     * 处理文件名序号，生成不重复的文件名
+     *
+     * @param baseName 基础文件名
+     * @param existingNames 已存在的文件名列表
+     * @return 处理后的文件名
+     */
+    public static String generateUniqueFileName(String baseName, java.util.List<String> existingNames)
+    {
+        if (existingNames == null || existingNames.isEmpty())
+        {
+            return baseName;
+        }
+
+        java.util.List<Integer> existingIndices = new java.util.ArrayList<>();
+        
+        // 收集所有已存在的序号
+        for (String existingName : existingNames)
+        {
+            if (existingName != null)
+            {
+                // 匹配格式：文件名（数字）
+                java.util.regex.Pattern pattern = java.util.regex.Pattern.compile("^" + java.util.regex.Pattern.quote(baseName) + "\\s*\\((\\d+)\\)$");
+                java.util.regex.Matcher matcher = pattern.matcher(existingName);
+                if (matcher.find())
+                {
+                    int index = Integer.parseInt(matcher.group(1));
+                    existingIndices.add(index);
+                }
+            }
+        }
+        
+        // 排序序号列表
+        java.util.Collections.sort(existingIndices);
+        
+        // 找到第一个可用的序号
+        int availableIndex = 1;
+        for (int index : existingIndices)
+        {
+            if (index == availableIndex)
+            {
+                availableIndex++;
+            }
+            else if (index > availableIndex)
+            {
+                break;
+            }
+        }
+        
+        // 生成新的文件名
+        return baseName + " (" + availableIndex + ")";
+    }
 }