八、Unable to instantiate Action, xxx.action.DeleteAction, defined for 'delete' in namespace
HTTP Status 500 -type Exception reportmessagedescription The server encountered an internal error () that prevented it from fulfilling this request.exceptionUnable to instantiate Action, xxx.action.DeleteAction, defined for 'delete' in namespace '/'Error creating bean with name 'serviceDao' defined in class path resource [ssh.xml]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: 'sessionFactory' or 'hibernateTemplate' is requiredcom.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:307)com.opensymphony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:388)com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:187)org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:47)org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:478)org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)root causeorg.springframework.beans.factory.BeanCreationException: Error creating bean with name 'serviceDao' defined in class path resource [ssh.xml]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: 'sessionFactory' or 'hibernateTemplate' is requiredorg.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1338)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)java.security.AccessController.doPrivileged(Native Method)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:283)org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByName(AbstractAutowireCapableBeanFactory.java:1029)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:977)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperties(AbstractAutowireCapableBeanFactory.java:329)com.opensymphony.xwork2.spring.SpringObjectFactory.autoWireBean(SpringObjectFactory.java:182)com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:162)com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:133)com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:139)com.opensymphony.xwork2.ObjectFactory.buildAction(ObjectFactory.java:109)com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:288)com.opensymphony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:388)com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:187)org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:47)org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:478)org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)root causejava.lang.IllegalArgumentException: 'sessionFactory' or 'hibernateTemplate' is requiredorg.springframework.orm.hibernate3.support.HibernateDaoSupport.checkDaoConfig(HibernateDaoSupport.java:117)org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1369)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1335)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)java.security.AccessController.doPrivileged(Native Method)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:283)org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByName(AbstractAutowireCapableBeanFactory.java:1029)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:977)org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperties(AbstractAutowireCapableBeanFactory.java:329)com.opensymphony.xwork2.spring.SpringObjectFactory.autoWireBean(SpringObjectFactory.java:182)com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:162)com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:133)com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:139)com.opensymphony.xwork2.ObjectFactory.buildAction(ObjectFactory.java:109)com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:288)com.opensymphony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:388)com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:187)org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:47)org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:478)org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)note The full stack trace of the root cause is available in the Apache Tomcat/6.0.20 logs.Apache Tomcat/6.0.20
原因：
ssh.xml的配置文件如下：
<bean id="orderDao" class="xxx.impl.HibernateOrderDAO">
<property name="sessionFactory" ref="hsFactory"></property>
</bean>
<bean id="itemDao" class="xxx.impl.HibernateItemDAO">
<property name="sessionFactory" ref="hsFactory"></property>
</bean>
<bean id="serviceDao" class="xxx.impl.HibernateServiceDAO">
<property name="orderDAO" ref="orderDao"></property>
<property name="itemDAO" ref="itemDao"></property>
</bean>
而定义ServiceDAO的实现类时，继承了HibernateDaoSupport，就必须使用 <property name="sessionFactory" ref="hsFactory"></property>
public class HibernateServiceDAO
extends HibernateDaoSupport implements ServiceDAO {....... }
但serviceDao组件只是引用了orderDao和itemDao，所以不需要继承HibernateDaoSupport
解决：
将public class HibernateServiceDAO
extends HibernateDaoSupport implements ServiceDAO {....... }
修改为：
public class HibernateServiceDAO implements ServiceDAO {....... }
