外來鍵在temperature表中，

<?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.hp.mapper.StuMapper">
    <resultMap id="Stu" type="com.hp.pojo.Student">
        <id property="stuid" column="stuid"/>
        <result property="username" column="username"/>
        <result property="pwd" column="pwd"/>
        <result property="stuname" column="stuname"/>
        <result property="sex" column="sex"/>
        <result property="status" column="status"/>
        <association property="temperature" column="id" javaType="com.hp.pojo.Temperature">
            <id property="id" column="id"></id>
            <result property="createtime" column="createtime"/>
            <result property="wd" column="wd"/>
        </association>
    </resultMap>

    <select id="login" resultType="com.hp.pojo.Student">
        select * from student where username=#{username} and pwd=#{pwd}
    </select>
    <select id="findStu" resultMap="Stu">
  <!-- sadsda-->
--         SELECT t.*, s.username,s.pwd,s.stuname,s.sex,s.status FROM temperature t  right JOIN student s ON s.stuid = t.stuid
        /*SELECT t.*,s.username,s.pwd,s.stuname,s.sex,s.status  FROM temperature t INNER JOIN
         (SELECT stuid,MAX(id) id FROM temperature  GROUP BY stuid ) t1 ON t1.id=t.id RIGHT JOIN student s ON t.stuid=s.stuid*/
        SELECT t.id,t.createtime,t.wd,s.* FROM temperature t LEFT JOIN (SELECT stuid,MAX(id) id FROM temperature  GROUP BY stuid )
         t1 ON t.id=t1.id RIGHT  JOIN student s ON t.stuid=s.`stuid`
        and stuname like #{stuname}
    </select>

    <insert id="addStu">
        INSERT INTO student(username,pwd,stuname,sex,status) VALUES (#{username},#{pwd},#{stuname},#{sex},#{status})
    </insert>
    <update id="editStu">
        update student set username=#{username},pwd=#{pwd},stuname=#{stuname},sex=#{sex},status=#{status} where stuid=#{stuid}
    </update>
    <update id="tingStu">
        update  student set status=1 where stuid=#{stuid}
    </update>
</mapper>