diff --git a/example/mqtt-car/src/main/java/org/dromara/mica/mqtt/server/entity/CarInfo.java b/example/mqtt-car/src/main/java/org/dromara/mica/mqtt/server/entity/CarInfo.java
index 917e7ca..46dbb2c 100644
--- a/example/mqtt-car/src/main/java/org/dromara/mica/mqtt/server/entity/CarInfo.java
+++ b/example/mqtt-car/src/main/java/org/dromara/mica/mqtt/server/entity/CarInfo.java
@@ -18,6 +18,7 @@ public class CarInfo implements Serializable {
 	/** customer_id */
 	private Long customerId;
 
+
 	/** 白名单生效时间 */
 	@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
 	private Date enableTime;