注入错误

[q5661889]

Test类

public class BeanTest
{
	public static void main(String[] args)throws Exception
	{
		// 创建Spring容器
		ApplicationContext ctx = new
			ClassPathXmlApplicationContext("beans.xml");
		// 获取id为person的Bean
		OrderAction o = ctx.getBean("orderAction" , OrderAction.class);
		// 调用useAxe()方法
		o.test();
	}
}

orderaction类：

@Component("orderAction")
public class OrderAction extends BaseAction{
	public void test(){
orderdao.find();
}
	}

baseaction类

@Component
public class BaseAction {
	@Autowired
public OrderDao orderdao;
}

orderdao类：

@Component
public interface OrderDao extends BaseDao<Order>{

}

basedao类：

@Component
public interface BaseDao<T> {
public void find();
}

daosuopport类：

@Component

public class DaoSupport<T> implements  BaseDao<T>{
	@Override
	public void find(){
	System.out.println("here");
}
}

order类：

public class Order {
public int name;
}

配置文件：

<?xml version="1.0" encoding="GBK"?>
<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-4.0.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-4.0.xsd">
	<!-- 自动扫描指定包及其子包下的所有Bean类 -->
	<context:component-scan 
		base-package="org.crazyit.app.service"/>
</beans>

所有类都在一个包
出错信息：
二月 25, 2016 9:55:02 下午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@182c5f3: startup date [Thu Feb 25 21:55:02 CST 2016]; root of context hierarchy
二月 25, 2016 9:55:02 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [beans.xml]
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'orderAction': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: public org.crazyit.app.service.OrderDao org.crazyit.app.service.BaseAction.orderdao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.crazyit.app.service.OrderDao] 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)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at org.crazyit.app.service.BeanTest.main(BeanTest.java:21)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: public org.crazyit.app.service.OrderDao org.crazyit.app.service.BaseAction.orderdao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.crazyit.app.service.OrderDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
... 13 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.crazyit.app.service.OrderDao] 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)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1103)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:963)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
... 15 more

[潇湘浪子]

注解应该加在实现类上 不能加在接口上

[q5661889]

引用 1 楼 u011274826 的回复:

注解应该加在实现类上 不能加在接口上

我把basedao和orderdao的注解都去掉了，还是报错。

[q5661889]

引用 3 楼 defonds 的回复:

org.crazyit.app.service.OrderDao 的实现类呢

daosupport类

[Defonds]

org.crazyit.app.service.OrderDao 的实现类呢