视图没有存储的异常
javax.faces.application.ViewExpiredException: viewId:/pages/gardeninfo/envRiskEditForm.faces - View /pages/gardeninfo/envRiskEditForm.faces could not be restored.
对于用户来说是不懂的，那只要在重写生命周期便可处理
第一种：
?1. 重写一个类，继承Lifecycle类，重写父类的execute方法，捕捉该异常，然后进行处理(如设置跳转到登录页面)。
2. 重写一个类，继承LifecycleFactoryImpl类，添加SessionLifecycleImpl的实例到工厂中，假设重写的子类为project.jsf.test.SessionLifecycleFactoryImpl。
3.在faces-config.xml中注册JSFLifecycleFactory类。
4.在web.xml中指定JSFLifecycleFactory工厂中创建的JSFLifecycle实例的键(key)。
public class JSFLifecycleFactory extends LifecycleFactoryImpl {
?private static Logger LOGGER = FacesLogger.LIFECYCLE.getLogger();
?public static final String JSF_LIFECYCLE = "JSF";
?public JSFLifecycleFactory() {
??super();
?
??lifecycleMap.put(JSF_LIFECYCLE, new JSFLifecycle());
??if (LOGGER.isLoggable(Level.FINE)) {
???LOGGER.fine("Created EJS JSF Lifecycle");
??}
?}
}
public class JSFLifecycle extends Lifecycle {
?private static Logger LOGGER = FacesLogger.LIFECYCLE.getLogger();
?private Phase response = new RenderResponsePhase();
?private Phase[] phases = {
???null, // ANY_PHASE placeholder, not a real Phase
???new RestoreViewPhase(), new ApplyRequestValuesPhase(),
???new ProcessValidationsPhase(), new UpdateModelValuesPhase(),
???new InvokeApplicationPhase(), response };
?private List<PhaseListener> listeners = new CopyOnWriteArrayList<PhaseListener>();
?public void execute(FacesContext context) throws FacesException {
??try {
???if (context == null) {
????throw new NullPointerException(MessageUtils
??????.getExceptionMessageString(
????????MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID,
????????"context"));
???}
???if (LOGGER.isLoggable(Level.FINE)) {
????LOGGER.fine("execute(" + context + ")");
???}
???for (int i = 1, len = phases.length - 1; i < len; i++) {
????if (context.getRenderResponse()
??????|| context.getResponseComplete()) {
?????break;
????}
????phases[i].doPhase(context, this, listeners.listIterator());
???}
??}
??catch (ViewExpiredException e) {
???JSFMessageUtils.removeMessage();
???JSFMessageUtils.showAndLogException("信息","操作错误", e
???????.getMessage(), null, JSFMessageUtils.WARN,
?????JSFMessageUtils.OK);
??}
??catch (Exception e) {
???JSFMessageUtils.removeMessage();
???JSFMessageUtils.showAndLogException("信息","操作错误", e
?????.getMessage(), null, JSFMessageUtils.WARN,
???JSFMessageUtils.OK);
??}
?}
?public void render(FacesContext context) throws FacesException {
??try {
???if (context == null) {
????throw new NullPointerException(MessageUtils
??????.getExceptionMessageString(
????????MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID,
????????"context"));
???}
???if (LOGGER.isLoggable(Level.FINE)) {
????LOGGER.fine("render(" + context + ")");
???}
???if (!context.getResponseComplete()) {
????response.doPhase(context, this, listeners.listIterator());
???}
??}
??catch (FacesException e) {
???JSFMessageUtils.removeMessage();
???JSFMessageUtils.showAndLogException("信息","操作错误", e
?????.getMessage(), null, JSFMessageUtils.WARN,
???JSFMessageUtils.OK);
??}
??catch (Exception e) {
???JSFMessageUtils.showAndLogException("信息","操作错误", e
?????.getMessage(), null, JSFMessageUtils.WARN,
???JSFMessageUtils.OK);
??}
?}
?public void addPhaseListener(PhaseListener listener) {
??if (listener == null) {
???throw new NullPointerException(MessageUtils
?????.getExceptionMessageString(
???????MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID,
???????"listener"));
??}
??if (listeners == null) {
???listeners = new CopyOnWriteArrayList<PhaseListener>();
??}
??if (listeners.contains(listener)) {
???if (LOGGER.isLoggable(Level.FINE)) {
????LOGGER.log(Level.FINE,
??????"jsf.lifecycle.duplicate_phase_listener_detected",
??????listener.getClass().getName());
???}
??}
??else {
???if (LOGGER.isLoggable(Level.FINE)) {
????LOGGER.log(Level.FINE, "addPhaseListener({0},{1})",
??????new Object[] { listener.getPhaseId().toString(),
????????listener.getClass().getName() });
???}
???listeners.add(listener);
??}
?}
?public PhaseListener[] getPhaseListeners() {
??return listeners.toArray(new PhaseListener[listeners.size()]);
?}
?public void removePhaseListener(PhaseListener listener) {
??if (listener == null) {
???throw new NullPointerException(MessageUtils
?????.getExceptionMessageString(
???????MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID,
???????"listener"));
??}
??if (listeners.remove(listener) && LOGGER.isLoggable(Level.FINE)) {
???LOGGER.log(Level.FINE, "removePhaseListener({0})",
?????new Object[] { listener.getClass().getName() });
??}
?}
}
?
faces-config.xml：
?
<factory>
??<lifecycle-factory>org.ejs.jsf.JSFLifecycleFactory</lifecycle-factory>
?</factory>
??web.xml
?<context-param>
??<param-name>javax.faces.LIFECYCLE_ID</param-name>
??<param-value>JSF</param-value>
?</context-param>s
?
第二种网上搜的：
?1. 重写一个类，继承LifecycleImpl类，重写父类的execute方法，捕捉该异常，然后进行处理(如设置跳转到登录页面)，假设重写的子类名为project.jsf.test.SessionLifecycleImpl。
2. 重写一个类，继承LifecycleFactoryImpl类，添加SessionLifecycleImpl的实例到工厂中，假设重写的子类为project.jsf.test.SessionLifecycleFactoryImpl。
3.在faces-config.xml中注册SessionLifecycleFactoryImpl类。
4.在web.xml中指定SessionLifecycleFactoryImpl工厂中创建的SessionLifecycleImpl实例的键(key)。
具体如下：
1.project.jsf.test.SessionLifecycleImpl类：
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 SessionLifecycleImpl extends LifecycleImpl {
public final static String SESSION_TIMEOUT_PAGES = "/pages/sessionTimeOut.faces";
public SessionLifecycleImpl() {
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()+ SESSION_TIMEOUT_PAGES;
response.sendRedirect(url);
}catch(Exception e) {
System.out.println(" Error: session timeout url redirect ");
}
}
}
2. project.jsf.test.SessionLifecycleFactoryImpl类：
import com.sun.faces.lifecycle.LifecycleFactoryImpl;
public class SessionLifecycleFactoryImpl extends LifecycleFactoryImpl {
public static final String SESSION_LIFECYCLE = "SessionLifecycle";
public SessionLifecycleFactoryImpl(){
super();
addLifecycle(SESSION_LIFECYCLE, new SessionLifecycleImpl());
}
}
3. faces-config.xml中注册SessionLifecycleFactoryImpl类
<faces-config>
<factory>
<lifecycle-factory>project.jsf.test.SessionLifecycleFactoryImpl</lifecycle-factory>
</factory>
.........
</faces-config>
4. web.xml中指定SessionLifecycleImpl实例的键(key)：
<context-param>
<param-name>javax.faces.LIFECYCLE_ID</param-name>
<param-value>SessionLifecycle</param-value>
</context-param>
?
第三种：网上搜的
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 ");
??}
?}
}
?在jsf配置文件 faces-config.xml 中添加如下内容
<factory>
???? <lifecycle-factory>trackingmap.TeleLifecycleFactoryImpl</lifecycle-factory>
</factory>
在web.xml 中添加如下内容
<context-param>
???? <param-name>javax.faces.LIFECYCLE_ID</param-name>
? ???<param-value>TELEEPOCH</param-value>
</context-param>