select * from user limit startIndex,pageSize; # 注意是从startIndex+1开始查询 pageSize 个
 
select * from user limit 3; # [0,3]

    //    limit实现分页  Map后面只能是 Integer 包装类 不可以 int
    List<User> getUserByLimit(Map<String, Integer> map);

    <select id="getUserByLimit" resultMap="com.tian.pojo.User" parameterType="map">
        select *
        from mybatis.user
        limit #{statrIndex},#{pageSize};
    </select>

    <select id="getUserByLimit" resultMap="UserMap" parameterType="map">
        select *
        from `mybatis`.`user`
        limit #{startIndex},#{pageSize};
    </select>
 
 
    <select id="getUserById" resultMap="UserMap">
        select *
        from `mybatis`.`user`
        where id = #{id};
    </select>