Question

我是Spring的新手，我会在外部jar中“自动”我的类接口到它的实现类。

这是一个jar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();
}

我制作自动线的课程

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

    public void run () {

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

主要课程

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();
      }
}

bean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>

当我运行时，它给出了以下错误：

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)}

[...]

我该怎么办？我正在使用带有STS的spring 3.2.0

我已从界面和@Require中删除@Component但未更改。 Jar文件在classpath中，包是正确的。谢谢

Spring的组件扫描在外部jar中找不到类

0 个答案: