java – 无论如何@ Inject / @将内部类自动装入外部类？

例如：

@Component
public class TestClass{

    // How to declare this class?
    private class TestClassInner{
       @Autowired private SomeBean somebean;

       public boolean doSomeWork(){
          return somebean.doSomething();
       }               
    }

    // Inject the inner class here in the outer class such that the outer class can use an instance of it
    @Autowired TestClassInner innerClass;

    @PostConstruct
    public void init(){
        ...
    }

    public void someMethod(){
       innerClass.doSomeWork();
       ...
    }
}

我试过用@Component注释内部类,使它成为一个公共类,使它成为公共静态等等,但似乎我尝试过的每一个组合总是会抛出一个或另一个错误.

作为一个私有内部类,Spring抱怨它缺少一个构造函数,即使我定义了一个.

作为一个带注释的@Component公共静态类,Spring抱怨它找到了两个bean – TestClass @ TestClassInner和testClass.TestClassInner.如果我使用@Qualifier,它会抱怨无法找到bean.

我认为我误解了这些内部bean如何工作/与Spring交互以正确理解是否/如何声明它们.

这甚至可能吗？

编辑

所以这里有一些我尝试过的组合(包括尝试实现基于@SotiriosDelimanolis响应的新构造函数)：

// How to declare this class?
@Component
public class TestClassInner{
    @Autowired private ProviderService providerService;

    public TestClassInner(){
        super();
    }
    public TestClassInner( TestClass t){
        super();
    }
}

引发错误(公共和私有内部类都抛出相同的错误)：

Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.ia.exception.TestClass$TestClassInner]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.ia.exception.TestClass$TestClassInner.<init>()
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:83)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1030)
    ... 54 more

我只是尝试使用我的测试类(上面)的静态公共嵌套类,它似乎正确注入.另一方面,在我的实际控制器中,它发现了2个匹配的类：

Caused by: org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type [com.ia.web.ContractController$InnerClass] is defined: expected single matching bean but found 2: com.ia.web.ContractController$InnerClass,contractController.InnerClass
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:865)

编辑2

@Controller
public class ContractController {

    @Component
    static public class InnerClass extends AttachmentControllerSupport{

        /**
         * 
         */
        public InnerClass() {
            super();
            // TODO Auto-generated constructor stub
        }

        public InnerClass( ContractController c){
            super();
        }
    }

    @Autowired private InnerClass innerclass;

    @Autowired private AttachmentControllerSupport attachmentControllerSupport;
    @Autowired private ContractService contractService;

}

applicationContext.xml中：

<context:component-scan base-package="com.ia">
    <context:exclude-filter expression=".*_Roo_.*" type="regex"/>
    <context:exclude-filter expression="org.springframework.stereotype.Controller" type="annotation"/>
</context:component-scan>
<context:spring-configured/>

restmvc-config.xml文件：
????
????
????????
????????
????

<mvc:annotation-driven conversion-service="applicationConversionService" >
  <mvc:argument-resolvers>
    <bean class="org.springframework.security.web.bind.support.AuthenticationPrincipalArgumentResolver" />
  </mvc:argument-resolvers>
</mvc:annotation-driven>