webwork2 jsp list 不能自动IOC到Action问题

模仿webworkshowcase做个批量的修改，但是将list对象在jsp种iterator出来之后，在转到另一个action中这个list对象count总是为空。。什么原因？

我的xwork配置以及src如下

java 代码

package com.sms.webwork.action;

import java.util.List;
import java.util.Iterator;
import java.util.ArrayList;
import com.opensymphony.xwork.ActionContext;
import com.opensymphony.xwork.ActionSupport;
import com.sms.model.User;
import com.sms.service.UserExistsException;
public class UserToolAction extends BaseAction{
//  private static final long serialVersionUID = 6776558938712115191L;
    String username;
    String phoneNumber;
    String message;
    List users=new ArrayList();
    List telephones=new ArrayList();

    public UserToolAction()
    {

    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    public String doSubmit() {

        User newUser=new User();
        newUser.setUsername(username);
        newUser.setPhoneNumber(phoneNumber);

        try
        {
            userManager.saveUser(newUser);
        }
        catch(UserExistsException ex)
        {
            return INPUT;

        }
        return SUCCESS;
    }

    public String doEdit()
    {
        Iterator itr=users.iterator();
        while(itr.hasNext())
        {
            try
            {
                userManager.saveUser((User)itr.next());
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }

        }
        return SUCCESS;
    }
    public String doList()
    {
        //users=userManager.getUsers(new User());
        users.addAll(userManager.getUsers(new User()));
        //users.addAll(userManager.getUsers(new User()));
        return SUCCESS;

    }
    public String doListSubmit()
    {
        return SUCCESS;
    }
    /**
     * A default implementation that does nothing an returns "success".
     *
     * @return {@link #SUCCESS}
     */
    public String save() throws Exception {

        for ( Iterator iter = users.iterator(); iter.hasNext();) {
            User p = (User) iter.next();
            userManager.saveUser(p);
        }
        return SUCCESS;
    }
    public String execute() throws Exception {

//      users=userManager.getUsers(new User());
        users.addAll(userManager.getUsers(new User()));
        //users.addAll(userManager.getUsers(new User()));
        return SUCCESS;
    }

    public List getUsers() {
        return users;
    }

    public void setUsers(List users) {
        this.users = users;
    }
    public List getTelephones() {
        return telephones;
    }

    public void setTelephones(List telephones) {
        this.telephones = telephones;
    }
}

xml 代码

<!---->>

<xwork>
    <include file="webwork-default.xml"/>

    <package name="default" extends="webwork-default">

        <default-action-ref name="home" />

        <action name="home" class="com.opensymphony.webwork.example.HomeAction">
            <result>/WEB-INF/pages/home.jspresult>
        action>

        <!---->
        <action name="addUser" class="com.sms.webwork.action.UserAction">
            <result>/WEB-INF/pages/home.jspresult>
            <result name="input">/WEB-INF/pages/adduser.jspresult>
        action>
        <action name="addUserSubmit" class="com.sms.webwork.action.UserAction" method="doSubmit">
            <result>/WEB-INF/pages/adduserSubmited.jspresult>
            <result name="input">/WEB-INF/pages/adduser.jspresult>
        action>
         <!---->
            <result type="redirect">listUser.actionresult>
        action>

    package>

    <package name="ui-tags" extends="webwork-default" namespace="/tags/ui">
        <action name="example" class="com.opensymphony.webwork.showcase.UITagExample">
            <result>example.jspresult>
            <result name="input">example.jspresult>
        action>
        <action name="exampleSubmit" class="com.opensymphony.webwork.showcase.UITagExample" method="doSubmit">
            <result>exampleSubmited.jspresult>
            <result name="input">example.jspresult>
        action>
    package>

    <package name="sms" extends="webwork-default" namespace="/sms">
        <action name="sms" class="com.sms.webwork.action.SmsAction" method="doSearch">
            <result>/WEB-INF/pages/sms.jspresult>
            <result name="input">/WEB-INF/pages/sms.jspresult>
        action>
        <action name="smsSubmit" class="com.sms.webwork.action.SmsAction" method="doSubmit">
            <result>/WEB-INF/pages/smsSubmited.jspresult>
            <result name="input">/WEB-INF/pages/sms.jspresult>
        action>

    package>

xwork>

java 代码

<!---->
<!---->






   method="post" namespace="/user" theme="simple" validate="false">
           
    
        ID User Name Telephone 
       
     
       
       
                               />





           value="users">



                     name="users(%{id}).username" value="%{username}" theme="simple" />






    />



     action="home"/>

 主要是user/ editUser.action到user/ editUserSubmit.action会出现users在save时总是为空的现象。

报错是
[sms] ERROR [http-8080-Processor23] ParametersInterceptor.setParameters(146) | Developer Notification (set webwork.devMode to false to disable this message):
Error setting expr 'users(6).username' with value '[Ljava.lang.String;@2ae278'

说明users里面根本没有对象。但是jsp上的list的确是users，java action中的list也是users，为什么到action还是没有呢？