JSF-javax.faces.application.ViewExpiredException:

最新推荐文章于 2022-11-26 18:58:34 发布

iteye_10724

最新推荐文章于 2022-11-26 18:58:34 发布

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分类专栏： JSF 文章标签： JSF JSP Java SUN Web

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本文介绍了解决JSF应用中视图过期异常的方法。针对不同Web容器如Sun App Server和Tomcat，提供了具体的配置代码示例。通过在web.xml中设置错误页或者自定义生命周期实现，可以优雅地处理session超时导致的问题。

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javax.servlet.ServletException: viewId:/login.jsp - View /login.jsp could not be restored. javax.faces.webapp.FacesServlet.service(FacesServlet.java:249) root cause javax.faces.application.ViewExpiredException: viewId:/login.jsp - View /login.jsp could not be restored. com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:185) com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251) com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117) javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)

出现这个错误是因为session 超时。当然关掉页面重新打开就不会有这个问题，但是在可用性方面就很差。作为开发人员看见这个错误会知道为什么，普通浏览者肯定会觉得出了什么问题。所以还是解决一下好。

如果是 sun appplication server

解决办法是在web.xml中添加
<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">
<%@ taglib uri="http://java.sun.com/jstl/ core" prefix="c"%>
<c:redirect url="/login.jsf" />

如果web容器是tomcat，解决办法如下：

package com.jsf.util;

import javax.faces.FacesException;
import javax.faces.application.ViewExpiredException;
import javax.faces.context.FacesContext;
import javax.servlet.http.HttpServletResponse;

import com.sun.faces.lifecycle.LifecycleImpl;

public class TeleLifecycleImpl extends LifecycleImpl
{
public TeleLifecycleImpl()
{
  super();
}

public void execute(FacesContext context)
{
  try
  {
   super.execute(context);
  }
  catch (ViewExpiredException vee)
  {
   redirect(context);
  }
  catch (FacesException fe)
  {
   throw fe;
  }
}

private void redirect(FacesContext context)
{
  try
  {
   context.responseComplete();
   context.renderResponse();
   HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getResponse();
   String url = context.getExternalContext().getRequestContextPath() + "/faces/error.jsp";
   response.sendRedirect(url);
  }
  catch (Exception e)
  {
   System.out.println("url redirect wrong ");
  }