fix image upload

src/main/java/ru/ulstu/news/NewsService.java

@@ -39,15 +39,18 @@ public class NewsService {
 
     public void save(News news) throws IOException {
         String fileName = System.currentTimeMillis() + "";
-        news.setImageFileName(fileName);
+        if (!news.getImageFile().isEmpty()) {
+            news.setImageFileName(fileName);
+            FileUtil.saveFile(FileSystemStorageService.UPLOAD_DIR, fileName, news.getImageFile());
+        } else {
+            news.setImageFileName(news.getImageFileName().isEmpty() ? "logo.png" : news.getImageFileName());
+        }
 
         if (news.getId() != null && (news.getId() != 0)) {
             newsRepository.save(news);
         } else {
             create(news);
         }
-
-        FileUtil.saveFile(FileSystemStorageService.UPLOAD_DIR, fileName, news.getImageFile());
     }
 
     public News getById(@NotNull Integer id) {

src/main/resources/templates/editNews.html

@@ -14,6 +14,7 @@
         <input type="hidden" th:field="*{id}">
         <input type="hidden" th:field="*{date}">
         <input type="hidden" th:field="*{version}">
+        <input type="hidden" th:field="*{imageFileName}">
         <div class="form-group">
             <label for="title">Заголовок</label>
             <input type="text" class="form-control" id="title" th:field="*{title}" placeholder="Заголовок новости">