单元测试出现org.apache.ibatis.binding.BindingException: Invalid bound statement (not found)

在web项目中，通过url访问，里面的mybatis映射能够正常工作，但是运行junit单元测试时却出现“org.apache.ibatis.binding.BindingException: Invalid bound statement (not found)”异常，仔细研究pom文件发现在build里面只包含了src/main/resource目录下的xml文件，而没有包含子目录下的xml文件，添加后正常：

<resources>
<resource>
<directory>${project.basedir}/src/main/resources</directory>
<includes>
<include>*.xml</include>
<include>*.properties</include>
<include>**/*.xml</include>
</includes>
</resource>
<resource>
<directory>${project.basedir}/src/test/resources</directory>
<includes>
<include>*.xml</include>
<include>**/*.xml</include>
<include>*.properties</include>
</includes>
</resource>
</resources>