public interface UserMapper 查询所有数据 Selectselect from user ListUser getAll; 根据id查询数据 Selectselect from user where id = #id ListUser selectByIdInteger id; 修改数据 Updateupdate us

缺失的，可以根据以下示例进行添加：

//添加数据 @Insert("insert into user(id,name,sex) values(#{id},#{name},#{sex})") int insertUser(User user);

//根据id删除数据 @Delete("delete from user where id=#{id}") int deleteUserById(Integer id);