相关疑难解决方法(0)

我有代码@Inject在一个类中工作但在其他类中没有.这是我的代码:

• 的context.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"

       xsi:schemaLocation=" http://www.springframework.org/schema/beans
                    http://www.springframework.org/schema/beans/spring-beans.xsd
                    http://www.springframework.org/schema/context
                    http://www.springframework.org/schema/context/spring-context.xsd
                    ">
    <bean id="multipartResolver"
          class="org.springframework.web.multipart.commons.CommonsMultipartResolver"></bean>
    <context:component-scan base-package="com.myfashions.services"/>
    <context:component-scan base-package="com.myfashions.dao"/>
</beans>

• SellerRetriever.java

public class SellerRetriever {
    @Inject
    UserDAO userDAO;
    ...
    ...
}

UserDAO类存在于com.myfashions.dao包中. @Inject在Seller.java中不起作用.有什么理由吗？