user冲突, pt/bt交互(待完善版)

Change-Id: I7530921962ac82ad1a896ae3c120416256f787e0
diff --git a/src/main/java/com/example/myproject/mapper/UserMapper.java b/src/main/java/com/example/myproject/mapper/UserMapper.java
index 3a29b64..1752801 100644
--- a/src/main/java/com/example/myproject/mapper/UserMapper.java
+++ b/src/main/java/com/example/myproject/mapper/UserMapper.java
@@ -28,4 +28,8 @@
     
     boolean hasRole(@Param("userId") Long userId, @Param("role") String role);
 
+    @Select("SELECT * FROM user WHERE user_id = #{userId}")
+    User selectByUserId(@Param("userId") Long userId);
+
+
 }
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