diff --git a/platform-common/src/main/java/com/lyms/platform/common/utils/DateUtil.java b/platform-common/src/main/java/com/lyms/platform/common/utils/DateUtil.java
index c4721f6..623c46e 100644
--- a/platform-common/src/main/java/com/lyms/platform/common/utils/DateUtil.java
+++ b/platform-common/src/main/java/com/lyms/platform/common/utils/DateUtil.java
@@ -464,31 +464,51 @@ public class DateUtil {
 
 
     public static Date addDay(Date srcDate, int days) {
-        Calendar rightNow = Calendar.getInstance();
-        rightNow.setTime(srcDate);
-        rightNow.add(Calendar.DAY_OF_YEAR, days);
-        return rightNow.getTime();
+        try {
+            lock.lock();
+            Calendar rightNow = Calendar.getInstance();
+            rightNow.setTime(srcDate);
+            rightNow.add(Calendar.DAY_OF_YEAR, days);
+            return rightNow.getTime();
+        }finally {
+            lock.unlock();
+        }
     }
 
     public static Date addMonth(Date srcDate, int month) {
-        Calendar rightNow = Calendar.getInstance();
-        rightNow.setTime(srcDate);
-        rightNow.add(Calendar.MONTH, month);
-        return rightNow.getTime();
+        try {
+            lock.lock();
+            Calendar rightNow = Calendar.getInstance();
+            rightNow.setTime(srcDate);
+            rightNow.add(Calendar.MONTH, month);
+            return rightNow.getTime();
+        }finally {
+            lock.unlock();
+        }
     }
 
     public static Date addYear(Date srcDate, int year) {
-        Calendar rightNow = Calendar.getInstance();
-        rightNow.setTime(srcDate);
-        rightNow.add(Calendar.YEAR, year);
-        return rightNow.getTime();
+        try {
+            lock.lock();
+            Calendar rightNow = Calendar.getInstance();
+            rightNow.setTime(srcDate);
+            rightNow.add(Calendar.YEAR, year);
+            return rightNow.getTime();
+        }finally {
+            lock.unlock();
+        }
     }
 
     public static Date addWeek(Date srcDate, int weak) {
-        Calendar rightNow = Calendar.getInstance();
-        rightNow.setTime(srcDate);
-        rightNow.add(Calendar.WEEK_OF_YEAR, weak);
-        return rightNow.getTime();
+        try {
+            lock.lock();
+            Calendar rightNow = Calendar.getInstance();
+            rightNow.setTime(srcDate);
+            rightNow.add(Calendar.WEEK_OF_YEAR, weak);
+            return rightNow.getTime();
+        }finally {
+            lock.unlock();
+        }
     }