From 08791ac5a56a68b6085fe78caf7dfe392bd5f9b3 Mon Sep 17 00:00:00 2001
From: Joshi <3040996759@qq.com>
Date: Wed, 16 Jul 2025 18:21:27 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9=E4=B8=8B=E8=BD=BD=E9=99=84?=
 =?UTF-8?q?=E4=BB=B6=E5=90=8E=E7=BC=80=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../src/main/java/com/ruoyi/oa/utils/EmailUtil.java   | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/ruoyi-oa/src/main/java/com/ruoyi/oa/utils/EmailUtil.java b/ruoyi-oa/src/main/java/com/ruoyi/oa/utils/EmailUtil.java
index ae63a35..ab6b2cb 100644
--- a/ruoyi-oa/src/main/java/com/ruoyi/oa/utils/EmailUtil.java
+++ b/ruoyi-oa/src/main/java/com/ruoyi/oa/utils/EmailUtil.java
@@ -357,12 +357,19 @@ public class EmailUtil {
     }
 
     /**
-     * 下载网络文件到本地临时文件
+     * 下载网络文件到本地临时文件，保留原始文件后缀
      * @param url 文件的http/https链接
      * @return 本地临时文件
      */
     public static File downloadUrlToTempFile(String url) throws Exception {
-        File tempFile = File.createTempFile("mail_attach_", null);
+        // 提取文件名和后缀
+        String fileName = url.substring(url.lastIndexOf('/') + 1);
+        String suffix = "";
+        int dotIdx = fileName.lastIndexOf('.');
+        if (dotIdx != -1) {
+            suffix = fileName.substring(dotIdx);
+        }
+        File tempFile = File.createTempFile("mail_attach_", suffix);
         try (java.io.InputStream in = new java.net.URL(url).openStream();
              java.io.OutputStream out = new java.io.FileOutputStream(tempFile)) {
             byte[] buffer = new byte[8192];