jsf 中 ViewExpiredException 的处理

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JSF JSP Web Tomcat SUN

在jsf 中，存在 session 的地方，一般会去使用session 去保存数据或者其他的事情，但是当session time out or forced to be invalidate , 就会抛出这样的 ViewExpiredException 异常。

如果是 web server == sun app server

then solution is :：

in web.xml :
<error-page>
<exception-type>javax.faces.application.ViewExpiredException</exception-type>
<location>/sessionExpired.jsp</location>
</error-page>

sessionExpired.jsp:

<%@page contentType="text/html" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@include file="/WEB-INF/jspf/taglibs.jspf" %>

<c:redirect url="/login.jsf" />

but if in tomcat container ,the solution is some complicated :

package trackingmap;

import com.sun.faces.lifecycle.LifecycleImpl;
import javax.faces.FacesException;
import javax.faces.context.FacesContext;
import javax.servlet.http.HttpServletResponse;
/**
*
* @author zhenggp
*/
public class TeleLifecycleImpl extends LifecycleImpl{

/** Creates a new instance of TeleLifecycleImpl */
public TeleLifecycleImpl() {
super();
}

public void execute(FacesContext context) throws FacesException{
try{
super.execute(context);
}catch(javax.faces.application.ViewExpiredException e){
System.out.println("catch ViewExpiredException here");
try{
context.responseComplete();
context.renderResponse();
HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getResponse();
String url = context.getExternalContext().getRequestContextPath() + "/faces/Login.jsp";///sessionExpired.jsp";
response.sendRedirect(url);
}catch(Exception e1){
System.out.println("url redirect wrong ");
}
//throw e;
}catch(FacesException ex){
throw ex;
}

}

}

package trackingmap;
import com.sun.faces.lifecycle.LifecycleFactoryImpl;
import javax.faces.lifecycle.Lifecycle;
/**
*
* @author zhenggp
*/
public class TeleLifecycleFactoryImpl extends LifecycleFactoryImpl {
public final static String CUSTOM_LIFECYCLE = "TELEEPOCH";
/** Creates a new instance of TeleLifecycleFactoryImpl */
public TeleLifecycleFactoryImpl() {
addLifecycle(CUSTOM_LIFECYCLE,new TeleLifecycleImpl());
}

}

add into faces-config.xml :

<factory>
<lifecycle-factory>trackingmap.TeleLifecycleFactoryImpl</lifecycle-factory>
</factory>

also add into web.xml

<context-param>
<param-name>javax.faces.LIFECYCLE_ID</param-name>
<param-value>TELEEPOCH</param-value>
</context-param>

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/yukunzgp/archive/2007/10/29/1853724.aspx

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