diff --git a/src/main/java/com/itheima/mapper/TeacherMapper.java b/src/main/java/com/itheima/mapper/TeacherMapper.java
index cb3924223c4005ec941ecfc74bcb3ff89b4531aa..91456b9c7812c9e8991d3571b929646f3bb85b72 100644
--- a/src/main/java/com/itheima/mapper/TeacherMapper.java
+++ b/src/main/java/com/itheima/mapper/TeacherMapper.java
@@ -8,13 +8,5 @@ public interface TeacherMapper {
     @Select("SELECT * FROM teacher WHERE id =#{id}")
     public Teacher findById(Integer id);
 
-    @Insert("INSERT INTO teacher(jobno,username,age,mobile) " +
-            "values (#{jobno},#{username},#{age},#{mobile})")
-    public int addTeacher(Teacher teacher);
 
-    @Update("UPDATE teacher SET username=#{username} WHERE id=#{id}")
-    public int updateTeacher(Teacher teacher);
-
-    @Delete("DELETE FROM teacher WHERE id=#{id}")
-    public int deleteTeacher(Integer id);
 }