关于在整合mybatis、spring、springmvc时出现的Invalid bound statement (not found): 错误

今天在使用ssm框架进行ajax使用测试的时候，copy了教学视频的代码，程序结构如下：

sping的关于mybatis的配置语句如下：

<!-- mapper的加强————————1.配置SqlSessionFactory -->
<bean class="org.mybatis.spring.SqlSessionFactoryBean">
    <!-- 设置数据源 -->
    <property name="dataSource" ref="dataSource" />
    <!-- 设置MyBatis核心配置文件 -->
    <property name="configLocation" value="classpath:SqlMapConfig.xml" />
</bean>
<!-- ———————————————————2.配置Mapper扫描 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <!-- 设置Mapper扫描包 -->
    <property name="basePackage" value="it.laobing.mapper" />
</bean>

这时运行项目，出现了Invalid bound statement (not found): 错误，具体错误信息如下：

 严重: Servlet.service() for servlet [SpringMvcController] in context with path [] threw exception [Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): it.laobing.mapper.CityMapper.selectCityName] with root cause

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): it.laobing.mapper.CityMapper.selectCityName

解决方式一：

通过观察，很明显的发现，Invalid bound statement (not found)没有找到的原因是mapple.xml配置文件被从mapper包中移出来了，然而MapperScannerConfigurer类扫描的包仍旧是原来的位置，这样，CityMappers.xml就无法扫描到了，程序就会报错，解决办法是，要么将CityMappers.xml放回到定义好的扫描包下，要么在SqlMapConfig.xml中，调价mappers语句，即

<mappers>
    <mapper resource="CityMappers.xml"/>
</mappers>

如此，问题就解决了 

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解决方式二：

在pom中添加如下语句：

1. <resources>

2. <resource>

3. <directory>src/main/java</directory>

4. <includes>

5. <include>**/*.properties</include>

6. <include>**/*.xml</include>

7. </includes>

8. <filtering>false</filtering>

9. </resource>

10. <resource>

11. <directory>src/main/resources</directory>

12. <includes>

13. <include>**/*.properties</include>

14. <include>**/*.xml</include>

15. </includes>

16. <filtering>false</filtering>

17. </resource>

18. </resources>