struts2+hibernate3.2+spring2.5

org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:532)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:426)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:389)


root cause

java.lang.NullPointerException
org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:792)
org.apache.struts2.components.UIBean.end(UIBean.java:510)
org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:42)
org.apache.jsp.save_jsp._jspx_meth_s_005ftextfield_005f0(save_jsp.java:156)
org.apache.jsp.save_jsp._jspx_meth_s_005fform_005f0(save_jsp.java:110)
org.apache.jsp.save_jsp._jspService(save_jsp.java:73)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:384)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:389)

出了上面的这个异常，我启动服务的时候是没有错的，只是访问页面的时候就报错了
<s:form action="saveUser">
<s:textfield name="user.firstname" label="%{getText('firstname')}"></s:textfield>
<s:textfield name="user.lastname" label="%{getText('lastname')}"></s:textfield>
<s:textfield name="user.age" label="%{getText('age')}"></s:textfield>
<s:submit value=" submit "></s:submit>
</s:form>

当我把action删除时，就没有上面的这个异常的
<action name="saveUser" class="saveUserAction">
<result name="success" type="redirect">
listAction.action
</result>
<result name="input">/save.jsp</result>
</action>
struts.xml文件内容


<bean name="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/oa"></property>
<property name="username" value="root"></property>
<property name="password" value="wjssheng0"></property>
<property name="maxActive" value="100"></property>
<property name="maxIdle" value="30"></property>
<property name="maxWait" value="500"></property>
<property name="defaultAutoCommit" value="true"></property>
</bean>

<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/wind/bean/User.hbm.xml</value>
</list>
</property>
</bean>

<bean id="userDao" class="com.wind.dao.impl.UserDaoImpl">
<property name="sessionFactory">
<ref bean="sessionFactory"/>
</property>
</bean>

<bean id="userService" class="com.wind.service.impl.UserServiceImpl">
<property name="userDao" ref="userDao"></property>
</bean>

<bean id="saveUserAction" class="com.wind.action.user.SaveUserAction" scope="prototype">
<property name="userService" ref="userService"></property>
</bean>

applicationContext.xml