MyBatis的增删改查

1、添加

<!--int insertUser();-->
<insert id="insertUser">
insert into t_user values(null,'admin','123456',23,'男')
</insert>

2、删除

<!--int deleteUser();-->
<delete id="deleteUser">
delete from t_user where id = 7
</delete>

3、修改

<!--int updateUser();-->
<update id="updateUser">
update t_user set username='ybc',password='123' where id = 6
</update>

4、查询一个实体类对象

<!--User getUserById();-->
<select id="getUserById" resultType="com.atguigu.mybatis.bean.User">
select * from t_user where id = 2
</select>

5、查询集合

<!--List<User> getUserList();-->
<select id="getUserList" resultType="com.atguigu.mybatis.bean.User">
select * from t_user
</select>