Spring整合MyBatis错误:Mapped Statements collection does not contain value for

MyBatis Mapper使用Spring注入:
applicationContext.xml
<bean id="studentMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
	<property name="mapperInterface" value="com.itsyc.fmpp.mappers.StudentMapper" />
	<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>

使用上面方式注入时需要注意下面问题:
- interface = com.itsyc.fmpp.mappers.StudentMapper.class
- mapper file = /com/itsyc/fmpp/mappers/StudentMapper.xml
- mapper namespace = com.itsyc.fmpp.mappers.StudentMapper
这三者必须相同否则会出现下面错误:
Stacktraces
java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.itsyc.fmpp.mappers.StudentMapper.getById

2011-04-22更新:
软件版本:
mybatis: 3.0.4
spring: 3.0.5
mybatis-spring: 1.0.0

更正:mapper file是可以和interface、namespace不同的(注意:interface和namespace必须相同),但这时需要进行配置。
方式一:
1.在MyBatis配置文件中添加mappers:
mybatis-config.xml
<mappers>
	<mapper resource="com/itsyc/fmpp/mappers/StudentMapper.xml" /> <!-- Mapper文件可以和interface不在相同路径下! -->
</mappers>

2.使用configLocation,在Spring配置文件中添加MyBatis配置文件的引用:
applicationContext.xml
<!-- MyBatis配置 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
	<property name="dataSource" ref="dataSource" />
	<property name="configLocation" value="classpath:mybatis-config.xml" />
</bean>

方式二:
使用mapperLocations,MyBatis-Spring会自动地扫描该路径下的所有Mapper文件:
applicationContext.xml
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
	<property name="dataSource" ref="dataSource" />
	<property name="mapperLocations" value="classpath*:com/itsyc/fmpp/mappers/*Mapper.xml" />
</bean>


具体请查看mybatis-spring的参考手册:

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