diff --git a/src/main/java/com/peanut/modules/book/controller/BuyOrderController.java b/src/main/java/com/peanut/modules/book/controller/BuyOrderController.java
index 86ce3808..7381e636 100644
--- a/src/main/java/com/peanut/modules/book/controller/BuyOrderController.java
+++ b/src/main/java/com/peanut/modules/book/controller/BuyOrderController.java
@@ -984,7 +984,7 @@ public class BuyOrderController {
             if(userCourseBuyEntities.size()>0){//延长有效期
                 UserCourseBuyEntity userCourseBuyEntity = userCourseBuyEntities.get(0);
                 userCourseBuyEntity.setDays(userCourseBuyEntity.getDays()+s.getDays());
-                if(userCourseBuyEntity.getEndTime()==null){
+                if(userCourseBuyEntity.getEndTime()!=null){
                     Calendar calendar = Calendar.getInstance();
                     calendar.setTime(userCourseBuyEntity.getEndTime());
                     calendar.add(Calendar.DAY_OF_MONTH,s.getDays());
diff --git a/src/main/java/com/peanut/modules/pay/alipay/service/impl/AliPayServiceImpl.java b/src/main/java/com/peanut/modules/pay/alipay/service/impl/AliPayServiceImpl.java
index 63ffb989..654b16fd 100644
--- a/src/main/java/com/peanut/modules/pay/alipay/service/impl/AliPayServiceImpl.java
+++ b/src/main/java/com/peanut/modules/pay/alipay/service/impl/AliPayServiceImpl.java
@@ -257,7 +257,7 @@ public class AliPayServiceImpl  implements AliPayService {
                             if(userCourseBuyEntities.size()>0){
                                 UserCourseBuyEntity userCourseBuyEntity = userCourseBuyEntities.get(0);
                                 userCourseBuyEntity.setDays(userCourseBuyEntity.getDays()+s.getDays());
-                                if(userCourseBuyEntity.getEndTime()==null){
+                                if(userCourseBuyEntity.getEndTime()!=null){
                                     Calendar calendar = Calendar.getInstance();
                                     calendar.setTime(userCourseBuyEntity.getEndTime());
                                     calendar.add(Calendar.DAY_OF_MONTH,s.getDays());
diff --git a/src/main/java/com/peanut/modules/pay/weChatPay/service/impl/WxpayServiceImpl.java b/src/main/java/com/peanut/modules/pay/weChatPay/service/impl/WxpayServiceImpl.java
index bad89c08..c201f92c 100644
--- a/src/main/java/com/peanut/modules/pay/weChatPay/service/impl/WxpayServiceImpl.java
+++ b/src/main/java/com/peanut/modules/pay/weChatPay/service/impl/WxpayServiceImpl.java
@@ -200,7 +200,7 @@ public class WxpayServiceImpl extends ServiceImpl<PayWechatOrderDao, PayWechatOr
                 if(userCourseBuyEntities.size()>0){
                     UserCourseBuyEntity userCourseBuyEntity = userCourseBuyEntities.get(0);
                     userCourseBuyEntity.setDays(userCourseBuyEntity.getDays()+s.getDays());
-                    if(userCourseBuyEntity.getEndTime()==null){
+                    if(userCourseBuyEntity.getEndTime()!=null){
                         Calendar calendar = Calendar.getInstance();
                         calendar.setTime(userCourseBuyEntity.getEndTime());
                         calendar.add(Calendar.DAY_OF_MONTH,s.getDays());