No qualifying bean of type ‘com.xxx.xx.service.xxService‘ available: expected at leas

No qualifying bean of type ‘com.xxxx.xx.service.xxService’ available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

出现这个问题的一个原因是：service组件没有扫描到

解决办法
修改spring-config.xml
加上下面这段就好了

<!-- 自动扫描，将类自动注册为bean，@Controller注解在spring mvc中扫描 -->
    <context:component-scan base-package="com.test">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>