spring加载资源文件中classpath*与classpath的区别

转载：https://blog.youkuaiyun.com/qq3516744991/article/details/50757650

在Spring和MyBitis继承的时候,配置mapperLocations.一开始配置是这样的.

需要加载路径为com/eloan/base/mapper和com/eloan/bu/mapper/business下的所有mapper文件

[java]  view plain  copy

1. <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
2.         <property name="dataSource" ref="dataSource" />  
3.         <property name="configLocation" value="classpath:mybatis-config.xml" />  
4.         <property name="typeAliasesPackage" value="com.eloan.base.domain;com.eloan.business.domain" />  
5.         <property name="mapperLocations" value="classpath:com/eloan/*/mapper/*Mapper.xml;" />  
6. </bean>  

结果一直报com/eloan/base/mapper下的mapper文件的某个方法找不到.

错误:Invalid bound statement (not found)

修改成这样就可以找到了.

[java]  view plain  copy

1. <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
2.         <property name="dataSource" ref="dataSource" />  
3.         <property name="configLocation" value="classpath:mybatis-config.xml" />  
4.         <property name="typeAliasesPackage" value="com.eloan.base.domain;com.eloan.business.domain" />  
5.         <property name="mapperLocations" value=classpath*:com/eloan/*/mapper/*Mapper.xml;" />  
6. </bean>  

原因是classpath:和classpath*:在spring加载资源的时候是不同的.

classpath:只能加载找到的第一个资源文件.(上面只匹配了com/eloan/bu/mapper/business下的mapper文件,而com/eloan/base/mapper就陪忽略了)

classpath*:能加载多个路径下的资源文件.(com/eloan/bu/mapper/business和com/eloan/base/mapper都被加载进来了.)