jsf 中 ViewExpiredException 的处理-优快云博客

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());
    }


}