struts2的注解模式配置action - struct报错

struts2的action可以交给spring去管理，用xml配置的action没有问题。但是我发现用struts2提供的注解配置的action，无法由spring管理。

先看下我的配置：

web.xml

<!--spring配置文件 -->
<context-param>
	<param-name>contextConfigLocation</param-name>
	<param-value>classpath:spring.xml</param-value>
</context-param>

<!-- spring监听器 -->
<listener>
	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<!-- 开启注解模式 -->
<context:annotation-config />

<!-- 自动扫描action、dao、service包(自动注入) -->
<context:component-scan base-package="ylj.struts2.*" />

<constant name="struts.objectFactory" value="spring" />

package ylj.struts2.action;

import java.util.Date;

import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

import com.opensymphony.xwork2.ActionSupport;

@ParentPackage("default")
@Namespace("/test")
@Component("testAction")
@Scope(ConfigurableBeanFactory.SCOPE_SINGLETON)
public class TestAction extends ActionSupport {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	@Action(value = "test", results = { @Result(name = SUCCESS, location = "/test.jsp", type = "dispatcher") })
	public String test() {
		return SUCCESS;
	}

	public TestAction() {
		System.out.println("--------------------------------------------");
		System.out.println("test\t" + new Date().toString());
		System.out.println("--------------------------------------------");
	}
}

信息: Initializing Spring root WebApplicationContext
2013-05-20 21:47:17 [org.springframework.web.context.ContextLoader]-[INFO] Root WebApplicationContext: initialization started
2013-05-20 21:47:17 [org.springframework.web.context.support.XmlWebApplicationContext]-[INFO] Refreshing Root WebApplicationContext: startup date [Mon May 20 21:47:17 CST 2013]; root of context hierarchy
2013-05-20 21:47:17 [org.springframework.beans.factory.xml.XmlBeanDefinitionReader]-[INFO] Loading XML bean definitions from class path resource [spring.xml]
2013-05-20 21:47:17 [org.springframework.beans.factory.support.DefaultListableBeanFactory]-[INFO] Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@2b7db1: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,testAction]; root of factory hierarchy
--------------------------------------------
test	Mon May 20 21:47:17 CST 2013
--------------------------------------------
2013-05-20 21:47:18 [org.springframework.web.context.ContextLoader]-[INFO] Root WebApplicationContext: initialization completed in 260 ms
2013-05-20 21:47:18 [com.opensymphony.xwork2.config.providers.XmlConfigurationProvider]-[INFO] Parsing configuration file [struts-default.xml]
2013-05-20 21:47:18 [com.opensymphony.xwork2.config.providers.XmlConfigurationProvider]-[INFO] Parsing configuration file [struts-plugin.xml]
2013-05-20 21:47:18 [com.opensymphony.xwork2.config.providers.XmlConfigurationProvider]-[INFO] Parsing configuration file [struts.xml]
2013-05-20 21:47:18 [org.apache.struts2.config.BeanSelectionProvider]-[INFO] Choosing bean (spring) for (com.opensymphony.xwork2.ObjectFactory)

--------------------------------------------
test	Mon May 20 21:49:21 CST 2013
--------------------------------------------
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test	Mon May 20 21:49:23 CST 2013
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test	Mon May 20 21:49:30 CST 2013
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test	Mon May 20 21:49:35 CST 2013
--------------------------------------------