action 返回跳转问题。奇怪
附上代码 （做struts2+hibernate 登陆） hibernate可以获取到用户名 action里面也执行了判断。但是返回 字符串的时候怎么写都是跳转不过页面去。。

DAO：
public class LoginDAO {
/**
* 查询数据库用户名是否存在
* @param userid
* @return
*/
public Users byuserId(String userid){
Users u = null;
Session session = null; //获取session持久化
Configuration configuration = new Configuration();
configuration.configure("hibernate.cfg.xml");
SessionFactory sessionFactory = configuration.buildSessionFactory();
session = sessionFactory.openSession();
session.beginTransaction(); //开始事物操作
u = (Users)session.get(Users.class, userid); //得到对象
System.out.println(u.getUserid()+u.getUsername());
session.getTransaction().commit(); //关闭事物操作
session.close();
return u;
}
} 


action：
public String execute(){
if(IsLogin(userid)){
return "list";
}
return "login";
}
/**
* 判断登陆成功与否
* @param userid
* @return
*/
public boolean IsLogin(String userid){
user = new LoginDAO().byuserId(userid);
if(user!=null){
ActionContext.getContext().put("user", user);
System.out.println("登陆成功。。。"+user.getUsername());
return true;
}
return false;
}
}




配置struts：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" 
"http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>

<package name="struts2" extends="struts-default">
<global-results>
<result name="login" >/login.jsp</result>
</global-results>
<action name="login" class="com.hs.action.LoginAction">
<result name="list">/index.jsp</result>
</action>
</package>
</struts>  
老是报：


严重: Exception starting filter struts2
Unable to load configuration. - [unknown location]
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:428)
at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4072)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4726)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1284)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1382)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:306)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1389)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1653)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1662)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(