diff --git a/bonus-common/src/main/java/com/bonus/common/utils/file/FileUploadUtils.java b/bonus-common/src/main/java/com/bonus/common/utils/file/FileUploadUtils.java
index 44414e2..81d8975 100644
--- a/bonus-common/src/main/java/com/bonus/common/utils/file/FileUploadUtils.java
+++ b/bonus-common/src/main/java/com/bonus/common/utils/file/FileUploadUtils.java
@@ -112,6 +112,14 @@ public class FileUploadUtils
         assertAllowed(file, allowedExtension);
 
         String fileName = extractFilename(file);
+        //把后缀都改成.png
+        int lastIndex = fileName.lastIndexOf('.');
+
+        if (lastIndex != -1) {
+             fileName =  fileName.substring(0, lastIndex + 1) + "png";
+        }else {
+             fileName = fileName + "." + "png";
+        }
 
         String absPath = getAbsoluteFile(baseDir, fileName).getAbsolutePath();
         file.transferTo(Paths.get(absPath));