diff --git a/src/main/java/com/sqx/modules/file/utils/FileUploadUtils.java b/src/main/java/com/sqx/modules/file/utils/FileUploadUtils.java
index f4020ca..362cddf 100644
--- a/src/main/java/com/sqx/modules/file/utils/FileUploadUtils.java
+++ b/src/main/java/com/sqx/modules/file/utils/FileUploadUtils.java
@@ -253,7 +253,7 @@ public class FileUploadUtils
         try (InputStream inputStream = new URL(imageUrl).openStream()) {
             BufferedImage image = ImageIO.read(inputStream);
             ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
-            ImageIO.write(image, "jpg", outputStream); // 指定图片格式为jpg
+            ImageIO.write(image, FileUtil.extName(imageUrl), outputStream); // 指定图片格式为jpg
             byte[] imageBytes = outputStream.toByteArray();
             return Base64.getEncoder().encodeToString(imageBytes);
         } catch (IOException e) {