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 e411788..c2bbc6e 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
@@ -249,20 +249,7 @@ 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;
-        } else {
-            S3ObjectSummary summary = listing.getObjectSummaries().get(0);
-            return !StringKit.equals(listing.getPrefix(), summary.getKey());
-        }
+        return exist(path.endsWith(DELIMITER) ? path : path + DELIMITER);
     }
 
     @Override