From cde7f6460a563a4e9b2624b395d9bdfe6f90e14c Mon Sep 17 00:00:00 2001
From: 648540858 <648540858@qq.com>
Date: 星期五, 01 九月 2023 09:21:05 +0800
Subject: [PATCH] Merge pull request #999 from a24211317/wvp-28181-2.0

---
 src/main/java/com/genersoft/iot/vmp/utils/DateUtil.java |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/src/main/java/com/genersoft/iot/vmp/utils/DateUtil.java b/src/main/java/com/genersoft/iot/vmp/utils/DateUtil.java
old mode 100644
new mode 100755
index 23cb9da..1abf2c6
--- a/src/main/java/com/genersoft/iot/vmp/utils/DateUtil.java
+++ b/src/main/java/com/genersoft/iot/vmp/utils/DateUtil.java
@@ -1,6 +1,8 @@
 package com.genersoft.iot.vmp.utils;
 
 
+import org.apache.commons.lang3.ObjectUtils;
+
 import java.time.Instant;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
@@ -109,6 +111,9 @@
     }
 
     public static long getDifferenceForNow(String keepaliveTime) {
+        if (ObjectUtils.isEmpty(keepaliveTime)) {
+            return 0;
+        }
         Instant beforeInstant = Instant.from(formatter.parse(keepaliveTime));
         return ChronoUnit.MILLIS.between(beforeInstant, Instant.now());
     }

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