diff --git a/src/main/java/com/yn/bftl/thirdparty/common/util/DateTimeUtils.java b/src/main/java/com/yn/bftl/thirdparty/common/util/DateTimeUtils.java
index 34b2b2f..4fd96c0 100644
--- a/src/main/java/com/yn/bftl/thirdparty/common/util/DateTimeUtils.java
+++ b/src/main/java/com/yn/bftl/thirdparty/common/util/DateTimeUtils.java
@@ -36,15 +36,21 @@
     }
 
     public static String setDateTimeToRFC3339(String dateStr) {
-        return DateUtil.format(Convert.toLocalDateTime(dateStr) ,"yyyy-MM-dd'T'HH:mm:ssXXX");
+        if(ObjectUtil.isNotEmpty(dateStr)) {
+            return DateUtil.format(Convert.toLocalDateTime(dateStr) ,"yyyy-MM-dd'T'HH:mm:ssXXX");
+        }
+        else {
+            return null;
+        }
+
     }
 
     public static String getDateTimeToRFC3339(String dateStr ) {
-        if(ObjectUtil.isEmpty(dateStr)) {
+        if(ObjectUtil.isNotEmpty(dateStr)) {
             return getDateTimeToRFC3339( dateStr,"yyyyMMddHHmmss");
         }
         else {
-            return "";
+            return null;
         }
     }