映射方式增删改

增

        insert into users (id, name, funkyNumber, roundingMode) values (
            #{id}, #{name}, #{funkyNumber}, #{roundingMode})

---

改

  update Author set
    username = #{username},
    password = #{password},
    email = #{email},
    bio = #{bio}
  where id = #{id}

---

删

  delete from Author where id = #{id}

通过接口映射方法的方式执行结束后会返回一个int值,为被操作记录条数

在操作完之后别忘了commit 不然操作会失败

session.commit();
session.close();
//session.rollback();//这个是撤销操作的方法