求助：ssh框架，struts2取值为NULL

一，WEB页面
<s:form action="userLoginAction.action" method="post">
<s:textfield name="user.usertelephone"></s:textfield>
<s:submit name="submit" value="确认提交"></s:submit>
</s:form>
二、STRUTS文件
<action name="userLoginAction" class="userAction" method="doLogin">
<result name="loginsuccess">/modules/user/success.jsp</result>
        <result name="loginerror">/modules/user/error.jsp</result>
</action>三、APPLICATIONcONTEXT.XML
<bean id="userAction" class="com.hbes.szcg.modules.user.action.UserAction"
scope="prototype">
<property name="userService" ref="userService"/>
</bean>四、User.hbm.xml<hibernate-mapping>
<class table="usertbl" name="com.hbes.szcg.modules.user.entity.User">
<id column="userid" name="userid" type="java.lang.Integer">
<generator class="native" />
</id> <property name="usertelephone" type="java.lang.String">
<column name="usertelephone" length="15" not-null="true" />
</property>
五、entity/user.java(片段）
public Integer getUserid() {
return this.userid;
} public void setUserid(Integer userid) {
this.userid = userid;
} public String getUsername() {
return this.username;
} public void setUsername(String username) {
this.username = username;
} 六\action.java
public String doLogin(){

String usertelephone=user.getUsertelephone();
//log.debug("telephone="+usertelephone);
    Integer result= userService.findIsExists(usertelephone);

    if (result.intValue()==1)
    {return "loginsuccess";}
    else
    {   
       return "loginerror";}
     
}TOMCAT运行错误提示：
java.lang.NullPointerException
com.hbes.szcg.modules.user.dao.impl.UserDaoImpl.findIsExists(UserDaoImpl.java:121)
com.hbes.szcg.modules.user.service.impl.UserServiceImpl.findIsExists(UserServiceImpl.java:37)
com.hbes.szcg.modules.user.action.UserAction.doLogin(UserAction.java:43)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:452)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:291)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:254)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263)
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:133)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:142)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:166)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:485)
org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

解决方案 »

  1.   

    com.hbes.szcg.modules.user.dao.impl.UserDaoImpl.findIsExists(UserDaoImpl.java:121)
    很明显，错误出现在这里，不知道你这里的代码是什么样的！仔细检测下！
      

  2.   

    这是代码部分：
    public Integer findIsExists(String usertelephone) {    Session session = sessionFactory.openSession(); 
    Criteria cr = session.createCriteria(User.class);  cr.add(Restrictions.eq("usertelephone", usertelephone));//
    List list = cr.list();
    session.close();
    return ((list.size() > 0) ? 1 : 0);

    }
    注入部分：、
    <bean id="sessionFactory"
    class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    <property name="configLocation" value="classpath:hibernate.cfg.xml" />
    <property name="dataSource">
    <ref bean="dataSource" />
    </property>
    </bean>

    <bean id="userDao" class="com.hbes.szcg.modules.user.dao.impl.UserDaoImpl">
    <property name="sessionFactory">
    <ref bean="sessionFactory" />
    </property>
    </bean>

        <bean id="userService" class="com.hbes.szcg.modules.user.service.impl.UserServiceImpl">
    <property name="userDao" ref="userDao"/>
    </bean> <bean id="userAction" class="com.hbes.szcg.modules.user.action.UserAction"
    scope="prototype">
    <property name="userService" ref="userService"/>
    </bean>
      

  3.   

    action没有对user进行封装啊， get  set方法呢？  还是代码没贴出来在action里面把usertelephone打印出来看看啊
      

  4.   

    确定 usertelephone 是不是 null
    ，还有就是  Session session = sessionFactory.openSession();   这个取到值不