mybaits中使用resultMap出现返回值报错问题

在mybaits中，我使用了resultMap标签，但是出现了以下错误，应该是返回值的问题
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:

Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for BookMapper.findBookById

The error may exist in Orders.xml

The error may involve com.itheima.Dao.OrdersDao.findOrdersWithBook

The error occurred while handling results

SQL: select * from others where id=?

Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for BookMapper.findBookById

<select id="findOrdersWithBook" parameterType="Integer" resultMap="OrdersWithBookResult">
        select * from others  where id=#{id}
    </select>
    <resultMap id="OrdersWithBookResult" type="Orders">
        <id property="id" column="id"/>
        <result property="user_id"  column="user_id"/>
        <result property="b_id" column="b_id"/>
        <result property="amount" column="amount"/>
        <collection property="bookList" column="id" ofType="com.itheima.po.Book"
                    select="BookMapper.findBookById">

        </collection>

    </resultMap>

你的标签是不是位置错了？还有接收的返回值是不是一个实体类，最怕你的数据库表中有相同的id

<resultMap id="OrdersWithBookResult" type="Orders">
        <id property="id" column="id"/>
        <result property="user_id"  column="user_id"/>
        <result property="b_id" column="b_id"/>
        <result property="amount" column="amount"/>
        <collection property="bookList" column="id" ofType="com.itheima.po.Book">
        </collection>
    </resultMap>
<select id="findOrdersWithBook" parameterType="Integer" resultMap="OrdersWithBookResult">
        select * from others  where id=#{id}
    </select>

    <result property="userId"  column="user_id"/>
    <result property="bId" column="b_id"/>