diff --git a/src/org/redkale/util/ByteArray.java b/src/org/redkale/util/ByteArray.java
index 5a7c998f6..8ab31b503 100644
--- a/src/org/redkale/util/ByteArray.java
+++ b/src/org/redkale/util/ByteArray.java
@@ -393,7 +393,7 @@ public final class ByteArray {
             start = 0;
             len = index;
         }
-        if (charset == null) return new String(Utility.decodeUTF8(bs, start, len));
+        if (charset == null) return new String(bs, start, len, StandardCharsets.UTF_8);
         return new String(bs, start, len, charset);
     }