Struts2自定义拦截器范例—Session超时的处理

2012-11-04

Struts2自定义拦截器实例—Session超时的处理版本:struts2.1.6实例功能：当用户登陆后，session超时后则返回

Struts2自定义拦截器实例—Session超时的处理

版本:struts2.1.6

实例功能：当用户登陆后，session超时后则返回到登陆页面重新登陆。

为了更好的实现此功能我们先将session失效时间设置的小点，这里我们设置成1分钟

修改web.xml

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?<session-config>??<session-timeout>1</session-timeout>??
</session-config>??

此实例用到的jsp页面及登陆所涉及到的相关代码请参考：

Struts2自定义拦截器实例—登陆权限验证

实现自定义拦截器类

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package?com.ywjava.interceptor;????
import?java.util.Map;????
import?com.opensymphony.xwork2.Action;??import?com.opensymphony.xwork2.ActionContext;??
import?com.opensymphony.xwork2.ActionInvocation;??import?com.opensymphony.xwork2.interceptor.AbstractInterceptor;??
import?com.ywjava.action.LoginAction;??import?com.ywjava.utils.Constants;??
??public?class?SessionIterceptor?extends?AbstractInterceptor?{??
??????@Override??
????public?String?intercept(ActionInvocation?actionInvocation)?throws?Exception?{??????????ActionContext?ctx?=?ActionContext.getContext();??
????????Map?session?=?ctx.getSession();??????????Action?action?=?(Action)?actionInvocation.getAction();??
????????if?(action?instanceof?LoginAction)?{??????????????return?actionInvocation.invoke();??
????????}??????????String?userName?=?(String)?session.get(Constants.USER_SESSION);??
????????if?(userName?==?null)?{??????????????return?Action.LOGIN;??
????????}?else?{??????????????return?actionInvocation.invoke();??
????????}??????}??
??}??

struts.xml中定义并使用此拦截器

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<?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="authority"?extends="struts-default">??
????????????????
????????<interceptors>??????????????<interceptor?name="authority"??
????????????????class="com.ywjava.interceptor.LoginInterceptor">??????????????</interceptor>??
????????????<interceptor?name="sessionout"???????????????class="com.ywjava.interceptor.SessionIterceptor"></interceptor>??
??????????????????????????<interceptor-stack?name="mydefault">??
????????????????<interceptor-ref?name="defaultStack"?/>??????????????????<interceptor-ref?name="authority"?/>??
????????????????<interceptor-ref?name="sessionout"/>??????????????</interceptor-stack>??
????????</interceptors>????
??????????????????<global-results>??
??????????????????????????<result?name="login">/login.jsp</result>??
????????</global-results>????
????????<action?name="loginform"??????????????class="com.ywjava.action.LoginFormAction">??
????????????<result?name="success">/login.jsp</result>??????????</action>??
??????????????????<action?name="login"?class="com.ywjava.action.LoginAction">??
????????????<result?name="success">/welcome.jsp</result>??????????????<result?name="error">/login.jsp</result>??
????????????<result?name="input">/login.jsp</result>??????????</action>??
??????????<action?name="show"?class="com.ywjava.action.ShowAction">??
????????????<result?name="success">/show.jsp</result>????????????????
????????????<interceptor-ref?name="mydefault"?/>??????????</action>??
??????????????</package>??
</struts>??

当我们登陆后一分钟不做任何操作刷新后则会跳转到登陆页面

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Struts2自定义拦截器范例—Session超时的处理