diff --git a/eladmin-system/src/main/java/cn/ysk/cashier/cons/RedisConstant.java b/eladmin-system/src/main/java/cn/ysk/cashier/cons/RedisConstant.java
index 9a6eb659..bf042263 100644
--- a/eladmin-system/src/main/java/cn/ysk/cashier/cons/RedisConstant.java
+++ b/eladmin-system/src/main/java/cn/ysk/cashier/cons/RedisConstant.java
@@ -35,7 +35,9 @@ public interface RedisConstant {
     static String getLockKey(String sign, Object... args) {
         StringBuilder key = new StringBuilder(LOCK_KEY + ":" + sign + ":");
         for (Object arg : args) {
-            key.append(":").append(arg.toString());
+            if (arg != null) {
+                key.append(":").append(arg);
+            }
         }
         return key.toString();
     }