NoSuchBeanDefinitionException:No qualifying bean of type found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency.

报错如下：

NoSuchBeanDefinitionException:No qualifying bean of type   found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency.

错误原因：bean注入失败

解决方法：

1.在配置文件中启动注解功能<mvc:annotation-driven/>

2.在配置文件中添加扫描目录<context:component-scan>

3.应该在实现类上面标记@Service等注解，而不是在接口上标记。

spring-mvc.xml如下所示：

<!-- 自动扫描该包，使SpringMVC认为包下用了@controller注解的类是控制器,@Service注解的是服务层 -->

<context:component-scan base-package="com.cmsz.crm" />

<!--开启注解驱动-->
<mvc:annotation-driven/>
    <!--避免IE执行AJAX时，返回JSON出现下载文件 -->
    <bean id="mappingJacksonHttpMessageConverter"
          class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/html;charset=UTF-8</value>
            </list>
        </property>
    </bean>
    <!-- 启动SpringMVC的注解功能，完成请求和注解POJO的映射 -->
    <bean
            class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON转换器 -->
            </list>
        </property>
    </bean>