diff --git a/src/main/java/uk/ac/cf/spring/demo/sports/Userdetail/User.java b/src/main/java/uk/ac/cf/spring/demo/sports/Userdetail/User.java
index 340184f88eafafecbec47650f2a45598f2f119fb..9f5bd332dbac8aecd02c0cdd0629dea4d5a58c05 100644
--- a/src/main/java/uk/ac/cf/spring/demo/sports/Userdetail/User.java
+++ b/src/main/java/uk/ac/cf/spring/demo/sports/Userdetail/User.java
@@ -3,9 +3,11 @@ package uk.ac.cf.spring.demo.sports.Userdetail;
 
 import lombok.AllArgsConstructor;
 import lombok.Data;
+import lombok.NoArgsConstructor;
 
 @Data
 @AllArgsConstructor
+@NoArgsConstructor // 自动生成无参构造函数
 public class User {
     private Long id;
     private String email;