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我是 Spring 的新手，我会将我的类接口“自动装配”到它在外部 jar 中的实现类。

这是一个罐子的代码： 

@Component
public class MongoSpring implements IMongo {

     MongoSpring() throws UnknownHostException {
        System.out.println("mongo template builder");
    }

    @Required
    public void save()  {
        System.out.println("mongo template save");
    }
}

类接口：

@Component
public interface IMongo {
    void save();
}

我制作自动连线的课程

@Component
public class Core {
    @Autowired
    public IMongo db ;

    public void run () {

        log.info("core ");
        db.save();
    }

主要班

public class MongoApp {

    private static ApplicationContext context;

    public static void main(String[] args) throws Exception {

         context = new ClassPathXmlApplicationContext("path.xml");

         Core c = (Core)context.getBean(Core.class);
         c.run();
      }
}

豆文件：

<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-3.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.0.xsd">

        <context:annotation-config />
        <context:component-scan base-package="org.spring.mongodb.example" />

    </bean>
</beans>

当我运行它给我以下错误：

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'core': Injection of autowired dependencies failed; 
nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: public org.spring.mongodb.example.IMongo org.spring.mongodb.example.Core.db; 
nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [org.spring.mongodb.example.IMongo] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. 
Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

[...]

我能做些什么？我正在使用带有 STS 的 spring 3.2.0

我已经从界面和@Require 中删除了@Component，但没有改变。Jar 文件在类路径中，并且包是正确的。谢谢

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