diff --git a/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java b/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java
index e9aa347..d6f8e20 100644
--- a/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java
+++ b/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java
@@ -399,19 +399,16 @@ public class S3ResourceRepository extends BaseResourceRepository {
 
     @Override
     public boolean isDirectory(String path) {
-
-        if (path.endsWith(DELIMITER) && exist(path)) {
-            return true;
-        }
-        ObjectListing listing = s3.listObjects(bucket, path);
-        if (listing.getObjectSummaries().isEmpty()) {
-            return false;
-        }
-        if (listing.getObjectSummaries().size() > 1) {
-            return true;
+        if (path.endsWith(DELIMITER)) {
+            return exist(path);
         } else {
-            S3ObjectSummary summary = listing.getObjectSummaries().get(0);
-            return !StringKit.equals(listing.getPrefix(), summary.getKey());
+            ObjectListing listing = s3.listObjects(bucket, path);
+            List<S3ObjectSummary> objectSummaries = listing.getObjectSummaries();
+            if (objectSummaries.isEmpty()) {
+                return false;
+            }
+            String dirFormat = path + DELIMITER;
+            return objectSummaries.stream().anyMatch(s3ObjectSummary -> StringUtils.equals(s3ObjectSummary.getKey(), dirFormat));
         }
     }