修改工具类

ruoyi-modules/management-platform/src/main/java/com/ruoyi/platform/utils/FileUtil.java

@@ -136,12 +136,12 @@ public class FileUtil {
         return new MultipartFile[]{new CustomMultipartFile(resource, fileName)};
     }
 
-    private static class CustomMultipartFile implements MultipartFile {
+    public static class CustomMultipartFile implements MultipartFile {
 
         private final ByteArrayResource resource;
         private final String fileName;
 
-        CustomMultipartFile(ByteArrayResource resource, String fileName) {
+        public CustomMultipartFile(ByteArrayResource resource, String fileName) {
             this.resource = resource;
             this.fileName = fileName;
         }