急：struts2中action中取不到session的值

请问高手，struts2中action中取不到session的值。

代码如下：

java代码如下：

public class LoginAction extends BaseAdminAction {

getRequest().getSession().setAttribute(SystemUtil.USERINFO, user);
        
        ActionContext.getContext().getSession().put("dishesPM","dishesPM");
        System.out.println("================LoginAction.checkLogin() USERINFO/dishesPM set=============="+getRequest().getSession().getId());
        return ajax(Status.success, "登录成功");

}

 

public class IndexAction extends BaseAdminAction {
 private static final long serialVersionUID = 12L;

 public String index(){
  String test = (String)getRequest().getSession().getAttribute("dishesPM");
  //System.out.println(test+"===========IndexAction.list()  dishesPM get================="+getRequest().getSession().getId());
  test = (String)ActionContext.getContext().getSession().get("dishesPM");
  System.out.println(test+"===========IndexAction.list()  dishesPM get================="+getRequest().getSession().getId());
  return "index";
 }

}

 

基类写了几个公共的方法如下：

public class BaseAdminAction extends ActionSupport {// 获取Request
// 获取Request
 protected HttpServletRequest getRequest() {
  return ServletActionContext.getRequest();
 }

 // 获取Response
 protected HttpServletResponse getResponse() {
  return ServletActionContext.getResponse();
 }

 // 获取ServletContext
 protected ServletContext getServletContext() {
  return ServletActionContext.getServletContext();
 }

 // 获取Attribute
 protected Object getAttribute(String name) {
  return ServletActionContext.getRequest().getAttribute(name);
 }

 // 设置Attribute
 protected void setAttribute(String name, Object value) {
  ServletActionContext.getRequest().setAttribute(name, value);
 }

 // 获取Parameter
 protected String getParameter(String name) {
  return ServletActionContext.getRequest().getParameter(name);
 }

 // 获取Parameter数组
 protected String[] getParameterValues(String name) {
  return ServletActionContext.getRequest().getParameterValues(name);
 }

 // 获取Session
 protected Object getSession(String name) {
  ActionContext actionContext = ActionContext.getContext();
  Map<String, Object> session = actionContext.getSession();
  return session.get(name);
 }
 
 // 设置Session
 protected void setSession(String name, Object value) {
  ActionContext actionContext = ActionContext.getContext();
  Map<String, Object> session = actionContext.getSession();
  session.put(name, value);
 }

 // 移除Session
 protected void removeSession(String name) {
  ActionContext actionContext = ActionContext.getContext();
  Map<String, Object> session = actionContext.getSession();
  session.remove(name);
 }

}

struts.xml文件

<constant name="struts.devMode" value="true" />
 <constant name="struts.action.extension" value="xhtml"/> <!-- .xhtml为访问扩展名 -->
 <constant name="struts.convention.action.name.separator" value="_" />
 <constant name="struts.convention.result.path" value="/jsps/" />
 <constant name="struts.convention.classes.reload" value="false" />
 <constant name="struts.convention.action.packages" value="com.define.dishes.action" />
 <constant name="struts.objectFactory" value="spring" />
 
 <package name="basePackage" extends="struts-default">
  <interceptors>
   <interceptor-stack name="baseStack">
                <interceptor-ref name="exception" />
                <interceptor-ref name="alias" />
                <interceptor-ref name="servletConfig" />
                <interceptor-ref name="prepare" />
                <interceptor-ref name="chain" />
                <interceptor-ref name="debugging" />
                <interceptor-ref name="scopedModelDriven" />
                <interceptor-ref name="modelDriven" />
                <interceptor-ref name="checkbox" />
                <interceptor-ref name="multiselect" />
                <interceptor-ref name="staticParams" />
                <interceptor-ref name="actionMappingParams" />
                <interceptor-ref name="params">
     <param name="excludeParams">dojo\..*,^struts\..*,.*\\u0023.*,.*\\x5Cu0023.*,.*\\x5cu0023.*</param>
                </interceptor-ref>
                <interceptor-ref name="conversionError" />
                <interceptor-ref name="validation">
                    <param name="excludeMethods">input,back,cancel,browse</param>
                    <param name="validateAnnotatedMethodOnly">true</param>
                </interceptor-ref>
                <interceptor-ref name="workflow">
                    <param name="excludeMethods">input,back,cancel,browse</param>
                </interceptor-ref>
            </interceptor-stack>
  </interceptors>

  <default-interceptor-ref name="baseStack" />

  <default-action-ref name="errorPage404Action" />

  <action name="errorPage404Action">
   <result type="redirect">/commons/error_page_404.html</result>
  </action>
 </package> 

<package name="admin" extends="basePackage" namespace="/admin">
  <interceptors>
   <interceptor name="logInterceptor" class="com.define.dishes.interceptor.LoginedCheckInterceptor" />
   <interceptor name="trimInterceptor" class="com.define.dishes.interceptor.TrimInterceptor" />
   <interceptor-stack name="adminStack">
    <interceptor-ref name="fileUpload">
     <param name="allowedTypes">image/jpeg,image/pjpeg,image/gif,image/bmp,image/x-ms-bmp,image/png,image/x-png</param>
     <param name="maximumSize">2097152</param>
    </interceptor-ref>
    <interceptor-ref name="baseStack" />
    <interceptor-ref name="logInterceptor" />
    <interceptor-ref name="trimInterceptor" />
   </interceptor-stack>
  </interceptors>
  <default-interceptor-ref name="adminStack" />
  <global-results>
   <result name="main" >/jsps/admin/main.jsp</result>
   <result name="login" >/jsps/admin/login.jsp</result>
   <result name="index" >/jsps/admin/index.jsp</result>
   <result name="top" >/jsps/admin/top.jsp</result>
   <result name="left" >/jsps/admin/left.jsp</result>
  </global-results>
 </package>

以上是主要的代码。

现在loginaction 转到的main.jsp可以取到session的值，但main.jsp进入到indexAction.action中就取不到session的值。所有的action类都一样，经过页面进来的action都不能取到session的值。