diff --git a/core/src/main/java/com/dite/znpt/service/impl/ImageServiceImpl.java b/core/src/main/java/com/dite/znpt/service/impl/ImageServiceImpl.java
index 782d5de..9b8e0f2 100644
--- a/core/src/main/java/com/dite/znpt/service/impl/ImageServiceImpl.java
+++ b/core/src/main/java/com/dite/znpt/service/impl/ImageServiceImpl.java
@@ -82,8 +82,8 @@ public class ImageServiceImpl extends ServiceImpl<ImageMapper, ImageEntity> impl
         Map<String, PartEntity> partIdMap= partService.listByIds(partIds).stream().collect(Collectors.toMap(PartEntity::getPartId, Function.identity()));
         list.stream().forEach(req -> {
             if(partIdMap.containsKey(req.getPartId())){
-                String path_prefix = permPath.concat(StrUtil.BACKSLASH).concat(req.getImageSource()).concat(StrUtil.BACKSLASH).concat(req.getPartId()).concat(StrUtil.BACKSLASH);
-                String temp_path_prefix = tempPath.concat(StrUtil.BACKSLASH).concat(req.getImageSource()).concat(StrUtil.BACKSLASH).concat(req.getPartId()).concat(StrUtil.BACKSLASH);
+                String path_prefix = permPath.concat(FileUtil.FILE_SEPARATOR).concat(req.getImageSource()).concat(FileUtil.FILE_SEPARATOR).concat(req.getPartId()).concat(FileUtil.FILE_SEPARATOR);
+                String temp_path_prefix = tempPath.concat(FileUtil.FILE_SEPARATOR).concat(req.getImageSource()).concat(FileUtil.FILE_SEPARATOR).concat(req.getPartId()).concat(FileUtil.FILE_SEPARATOR);
                 File file = new File(req.getImagePath());
                 if(file.exists() && req.getImagePath().contains(temp_path_prefix)){
                     ImageEntity entity = new ImageEntity();
@@ -122,7 +122,7 @@ public class ImageServiceImpl extends ServiceImpl<ImageMapper, ImageEntity> impl
             throw new ServiceException(Message.IMAGE_IS_EMPTY);
         }
         List<ImageReq> list = new ArrayList<>(files.length);
-        String path_prefix = tempPath.concat(StrUtil.BACKSLASH).concat(imageSource).concat(StrUtil.BACKSLASH).concat(partId).concat(StrUtil.BACKSLASH);
+        String path_prefix = tempPath.concat(FileUtil.FILE_SEPARATOR).concat(imageSource).concat(FileUtil.FILE_SEPARATOR).concat(partId).concat(FileUtil.FILE_SEPARATOR);
         for (MultipartFile file : files) {
             if (!file.isEmpty()) {
                 try {
@@ -147,7 +147,7 @@ public class ImageServiceImpl extends ServiceImpl<ImageMapper, ImageEntity> impl
             throw new ServiceException(Message.IMAGE_SOURCE_ID_NOT_EXIST_OR_ILLEGAL);
         }
         String dateStr = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd"));
-        String path_prefix = permPath.concat(StrUtil.BACKSLASH).concat(imageSource).concat(StrUtil.BACKSLASH).concat(dateStr).concat(StrUtil.BACKSLASH);
+        String path_prefix = permPath.concat(FileUtil.FILE_SEPARATOR).concat(dateStr).concat(FileUtil.FILE_SEPARATOR).concat(imageSource).concat(FileUtil.FILE_SEPARATOR);
         String path = path_prefix + file.getOriginalFilename();
         FileUtil.writeBytes(file.getBytes(),path);
         return path;