diff --git a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/AntenatalExaminationFacade.java b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/AntenatalExaminationFacade.java
index a9d8bde..a851a66 100644
--- a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/AntenatalExaminationFacade.java
+++ b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/AntenatalExaminationFacade.java
@@ -1121,10 +1121,10 @@ public class AntenatalExaminationFacade {
         Collections.sort(listDate, new Comparator<SortIn>() {
             @Override
             public int compare(SortIn o1, SortIn o2) {
-                if (o1.getDate() != null && o1.getDate().after(o2.getDate())) {
+                if (o1.getDate() != null &&null != o2.getDate()&& o1.getDate().after(o2.getDate())) {
                     return -1;
                 }
-                if (o1.getDate() != null && o1.getDate().before(o2.getDate())) {
+                if (o1.getDate() != null &&null != o2.getDate()&& o1.getDate().before(o2.getDate())) {
                     return 1;
                 }
                 return 0;