无法正确加载Spring上下文

Question

What I'm doing : I'm loading my Spring application external JAR into another non-spring application. I'm doing it like this:

ApplicationContext ap = new ClassPathXmlApplicationContext("classpath:/META-INF/spring/application-context.xml");
MyService myService = (MyService) ap.getBean("myBusinessService");

this is the exception that I receive:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myBusinessService': Injection of autowired dependencies failed; nested exception is
org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.test.domain.dao.MyDAO com.test.domain.service.impl.MyBusinessService.viaggioDAO; nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.test.domain.dao.MyDAO] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency.

Package inside those jar are:

• com.test.domain.service for service Interfaces
• com.test.domain.services.impl for service implementations
• com.test.domain.dao for DAO interfaces
• com.test.domain.dao.impl for DAO implementation

Question : Why am I receiving this error?

EDIT: more info about my app.

application-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"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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
                           http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

    <!-- Spring IoC Context -->
    <context:component-scan base-package="com.test" />

    <import resource="root-config.xml" />
    <import resource="classpath:/root-context.xml" />

    <!-- Enables the Spring MVC @Controller programming model -->
    <mvc:annotation-driven />

</beans>

MyBusinessService.java

@Service(value="myBusinessService")
public class MyBusinessService implements MyService {
    @Autowired
    private MyDAO myDAO;

    @Override
    public List<Stuff> getAllStuff() throws SQLException {
        List<Stuff> stuff = this.myDAO.findAllStuff();
        return stuff;
    }
}

Answer 1

It is the visiblity problem , check whether you have listed all packages in your dispatcher-servlet.xml . Add,

<context:component-scan base-package="com.test.domain" />

to make all your package visible to your dispatcher

Also ensure that , the bean you are trying to autowire shoud have valid qualifier as @Component or @Service

If you are using the xml configuration make sure , you define the bean in the dispatcher . Before autowiring it