mybatis中dao中对应的Mapper.xml编写

Mapper.xml的编写：

<?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.fu.dao.UserMapper">
<!--    开启缓存-->
    <cache
            eviction="FIFO"
            flushInterval="60000"
            size="512"
            readOnly="true"/>

    <select id="getUser" resultType="user" parameterType="int">
        select * from user where id = #{id}
    </select>
    
</mapper>