diff --git a/src/main/java/com/syjiaer/clinic/server/common/util/DateUtil.java b/src/main/java/com/syjiaer/clinic/server/common/util/DateUtil.java
index 5b3b737..115df09 100644
--- a/src/main/java/com/syjiaer/clinic/server/common/util/DateUtil.java
+++ b/src/main/java/com/syjiaer/clinic/server/common/util/DateUtil.java
@@ -6,6 +6,7 @@ import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Locale;
 import java.util.stream.Stream;
 
 public class DateUtil {