[MyBatis]mapperLocations属性通配符的使用

示例：

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

注意点：[color=red]在classpath后面的*必不可少，缺少型号的话后面的通配符不起作用。[/color]

**表示可以表示任意多级目录，如：上述配置可以查到【com/huaxin/framework/system/dao/UserDaoMapper.xml】

*表示多个任意字符

缺少classpath后面的*会报以下的错误：

[color=gray]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 framework.system.dao.UserDao.getNextUserId_MySQL 

### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for framework.system.dao.UserDao.getNextUserId_MySQL 

 at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75) 

 at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:371) 

 at com.sun.proxy.$Proxy18.selectOne(Unknown Source) 

 at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:163) 

 at com.huaxin.framework.core.dao.impl.BaseDaoImpl.selectOne(BaseDaoImpl.java:298) 

 at com.huaxin.framework.system.dao.impl.UserDaoImpl.getNextUserId(UserDaoImpl.java:41) [/color]