no Result Maps were found for the Mapped Statement ‘com.feng.mybatis.mapper.

1、错误信息

no Result Maps were found for the Mapped Statement 'com.feng.mybatis.mapper.

2、对错mapper.xml文件对比

<mapper namespace="com.feng.mybatis.mapper.BookMapper">
	<!--错误的配置：parameterType-->
    <!--<select id="getBookById" parameterType="com.feng.mybatis.bean.Book">
        select * from book where id=#{id}
    </select>-->
    <!--正确的配置：resultType-->
    <select id="getBookById" resultType="com.feng.mybatis.bean.Book">
        select * from book where id=#{id}
    </select>
</mapper>

3、错误原因
本来因该配置resultType，结果配置成了parameterType