Spring配置问题

Question

java.lang.ClassCastException: $Proxy10
at com.union.flow.workitem.webapp.action.BaseDispatchAction.setServlet(BaseDispatchAction.java:100)
at org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:295)他说我这行出错
private ItemHelperService itemHelperService ;
this.itemHelperService = (ItemHelperService) wac.getBean("itemHelperService");<bean id="taskServiceTarget"
class="com.union.flow.workitem.workItemHelper.ItemHelperServiceImpl" singleton="true">
<property name="taskDao">
<ref bean="taskDao" />
</property>
<property name="flowDao">
<ref bean="workflowdao" />
</property>
<property name="itemDao">
<ref bean="itemDao" />
</property>
<property name="stepDao">
<ref bean="stepDao" />
</property>
<property name="versionDao">
<ref bean="flowversiondao" />
</property>
<property name="flowFormDao">
<ref bean="flowFormDao" />
</property>
<property name="flowTaskDao">
<ref bean="flowTaskDao" />
</property>
<property name="flowStepDao">
<ref bean="flowStepDefdao" />
</property>
<property name="formTemplateHisDao">
<ref bean="formTemplateHisDao" />
</property>
<property name="formDao">
<ref bean="formDao" />
</property>
<property name="holDao">
<ref bean="holidayDao" />
</property>
</bean>请问这是什么错呀

Answer 1

wac.getBean("");
获得的是<bean id="taskServiceTarget" 
你是这意思么？
不要重新private ItemHelperService itemHelperService ; 

Answer 2

beans是这样的
<beans>
<bean id="taskServiceTarget"
class="com.union.flow.workitem.workItemHelper.ItemHelperServiceImpl"
singleton="true">
<property name="taskDao">
<ref bean="workitemTaskDao" />
</property>
<property name="flowDao">
<ref bean="workflowdao" />
</property>
<property name="itemDao">
<ref bean="itemDao" />
</property>
<property name="stepDao">
<ref bean="stepDao" />
</property>
<property name="versionDao">
<ref bean="flowversiondao" />
</property>
<property name="flowFormDao">
<ref bean="flowFormdao" />
</property>
<property name="flowTaskDao">
<ref bean="flowtaskdao" />
</property>
<property name="flowStepDao">
<ref bean="flowStepDefdao" />
</property>
<property name="formTemplateHisDao">
<ref bean="formTemplateHisDao" />
</property>
<property name="formDao">
<ref bean="formDao" />
</property>
<property name="holDao">
<ref bean="holidayDao" />
</property>
</bean> <bean id="itemHelperService" parent="txProxyTemplate">
<property name="target">
<ref local="taskServiceTarget" />
</property>
</bean></beans>

Answer 3

配置文件里没有"itemHelperService"吧为什么是
<bean id="taskServiceTarget" 
class="com.union.flow.workitem.workItemHelper.ItemHelperServiceImpl" 
singleton="true"> 
而不是
<bean id="itemHelperService" 
class="com.union.flow.workitem.workItemHelper.ItemHelperServiceImpl" 
singleton="true"> 
呢?

Answer 4

taskServiceTarget 我得这个名字和其他里面的名字叫重了