ssm mybatis如何配置多个mapper目录

<!-- 扫描 xxxMapper.xml -->   
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation"  value="classpath:spring/mybatis-config.xml"/>  
        <property name="mapperLocations" value="classpath*:com/xxxcompany/xxxproject/*/mapper/*.xml" />
    </bean>

<!-- 扫描 xxxMapper -->
    <bean id="daoScan" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.xxxcompany.xxxproject.*.mapper" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation"  value="classpath:mybatis-config.xml"/>  
        <property name="mapperLocations" value="classpath*:com/dada/**/*Mapper.xml"/> 
    </bean>

    <!-- 配置扫描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.dada.test.mapper*"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>

<!-- 1.使用相对于类路径的资源引用 -->
<mappers>
  <mapper resource="org/mybatis/builder/AuthorMapper.xml"/>
</mappers>
<!-- 2.使用完全限定资源定位符（URL） -->
<mappers>
  <mapper url="file:///var/mappers/AuthorMapper.xml"/>
</mappers>
<!-- 3.使用映射器接口实现类的完全限定类名 -->
<mappers>
  <mapper class="org.mybatis.builder.AuthorMapper"/>
  <mapper class="org.mybatis.builder.BlogMapper"/>
  <mapper class="org.mybatis.builder.PostMapper"/>
</mappers>
<!-- 4.将包内的映射器接口实现全部注册为映射器 -->
<mappers>
  <package name="org.mybatis.builder"/>
</mappers>