spring mvc和shiro进行整合时，我采用的是注解的方式，也就是@Autowired，发现service服务无法再自定义的realm中进行注入，会出现以下错误。
Error creating bean with name 'shiroFilter' defined in class path resource [spring-shiro.xml]: Cannot resolve reference to bean 'securityManager' while setting bean property 'securityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'securityManager'……
Error creating bean with name 'shiroFilter' defined in class path resource [spring-shiro.xml]: Cannot resolve reference to bean 'securityManager' while setting bean property 'securityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'securityManager'……
类似于这种错误，这是springmvc配置文件 优先级不够的原因造成，需要在web.xml文件中作调整：
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:config/spring.xml,
classpath:config/spring-shiro.xml
</param-value>
</context-param>
因为shiro处于filter级别，过滤的时候spring中的bean还没有被使用出来。写了这配置以后，如果还出错，则建议检查applicationContext.xml中的扫描包看是否被扫进来，还有就是自定义中的realm在spring-shiro.xml中是否配置正确。
