REPORT-112857 fix: 改下isDir的写法

src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java

@@ -412,7 +412,12 @@ public class S3ResourceRepository extends BaseResourceRepository {
 
     @Override
     public boolean isDirectory(String path) {
-        return dirExist(path);
+        if (!path.endsWith(DELIMITER) && fileExist(path)) {
+            //是文件
+            return false;
+        } else {
+            return dirExist(path) || isParentPathAbsent(path);
+        }
     }
 
     @Override