<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.newfiber.api.pc.dao.PeopleMapper"> <resultMap id="onlineUserMap" type="com.newfiber.api.pc.model.vo.OnlineUserVo"> <result column="area_name" property="areaName"/> <result column="people_name" property="peopleName"/> <result column="people_no" property="peopleNo"/> <result column="phone" property="phone"/> <result column="job" property="job"/> <result column="x" property="x"/> <result column="y" property="y"/> <result column="update_time" property="updateTime"/> </resultMap> <select id="selectOnlineUser" resultMap="onlineUserMap"> select mp.people_name,mp.people_no,mp.phone,mp.area_name,mp.job,pl.x,pl.y,pl.update_time from meet_people mp LEFT JOIN people_location pl on mp.people_no = pl.user_no </select> </mapper>