JSF Execption: No saved view state could be found for the view identifier

C

crombix

Grünschnabel
Hallo liebe Community,
ich hoffe ihr könnt mir weiter helfen !! Und zwar hab jetzt anfangen mich ein bißchen in JSF einzuarbeiten ! Dafür hab ein JSF-Tutorial durchgelesen und als praktisches Beispiel eine einfache jsp-Seite mit einem kleinen Formular benutzt, die beim anklicken auf ein submitt-button auf eine andere Seite weiterführt !! Das sah am Anfang alles verständlich aus, nur beim anklicken auf dieses Button immer eine ViewExpiredException gefeuert wird !?...:rolleyes:
Damit ihr mir folgen könnt hab ich mein Code zum nachprüfen :) :

Die benutzten Bean-klassen:

NameBean.java:
Code: 
public class NameBean {
	
	private String firstName = "";
	private String lastName = "";
	
	public NameBean() {		
	}
	
	public NameBean(String firstName, String lastName) {
		setFirstName(firstName);
		setLastName(lastName);
	}
	
	public String getFirstName() {
		return(firstName);
	}
	
	public void setFirstName(String newFirstName) {
		firstName = newFirstName;
	}
	
	public String getLastName() {
		return(lastName);
	}
	
	public void setLastName(String newLastName) {
		lastName = newLastName;
	}

}


CompanyBean.java:
Code: 
public class CompanyBean {

	private String companyName="";
	private String business="";
	
	public CompanyBean(String companyName,	String business) {
	setCompanyName(companyName);
	setBusiness(business);
	}
	public String getCompanyName() { 		
		return(companyName);	
	}
	
	public void setCompanyName(String newCompanyName) {
	companyName = newCompanyName;
	}
	
	public void  setBusiness(String newBusiness) { 
		 business = newBusiness;
	}
	
	public String getBusiness() { 
		return(business); 
	}	
	
}

EmployeeBean.java:
Code: 
public class EmployeeBean {
	
	
	private NameBean name;
	private CompanyBean company;
	
	public EmployeeBean(NameBean name, CompanyBean company) {
		setName(name);
		setCompany(company);
		}
	
	public EmployeeBean(){}
	
	
	public NameBean getName() {
		return(name);
	}
	
	public void setName(NameBean newName) {
		name = newName;
	}
	
	public CompanyBean getCompany() {
		return(company);
	}
	
	public void setCompany(CompanyBean newCompany) {
		company = newCompany;
	}
	
	
	public String processEmployee() {
		if (Math.random() < 0.5) {
			return("accept");
		} else {
			return("reject");
		}
	}

}

web.xml:

Code: 
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>JSF_Sub_Project</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>*.faces</url-pattern>
  </servlet-mapping>
  <context-param>
    <param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
    <param-value>resources.application</param-value>
  </context-param>
  <context-param>
    <description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
    <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
    <param-value>client</param-value>
  </context-param>
  <context-param>
    <param-name>facelets.BUILD_BEFORE_RESTORE</param-name>
	<param-value>true</param-value>
  </context-param>
  <context-param>
    <description>
	This parameter tells MyFaces if javascript code should be allowed in
	the rendered HTML output.
	If javascript is allowed, command_link anchors will have javascript code
	that submits the corresponding form.
	If javascript is not allowed, the state saving info and nested parameters
	will be added as url parameters.
	Default is 'true'</description>
    <param-name>org.apache.myfaces.ALLOW_JAVASCRIPT</param-name>
    <param-value>true</param-value>
  </context-param>
  <context-param>
    <description>
	If true, rendered HTML code will be formatted, so that it is 'human-readable'
	i.e. additional line separators and whitespace will be written, that do not
	influence the HTML code.
	Default is 'true'</description>
    <param-name>org.apache.myfaces.PRETTY_HTML</param-name>
    <param-value>true</param-value>
  </context-param>
  <context-param>
    <param-name>org.apache.myfaces.DETECT_JAVASCRIPT</param-name>
    <param-value>false</param-value>
  </context-param>
  <context-param>
    <description>
	If true, a javascript function will be rendered that is able to restore the
	former vertical scroll on every request. Convenient feature if you have pages
	with long lists and you do not want the browser page to always jump to the top
	if you trigger a link or button action that stays on the same page.
	Default is 'false'
	</description>
    <param-name>org.apache.myfaces.AUTO_SCROLL</param-name>
    <param-value>true</param-value>
  </context-param>
  <listener>
    <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
  </listener>
</web-app>

faces-config.xml:
Code: 
<?xml version="1.0" encoding="UTF-8"?>
<faces-config version="1.2" xmlns="http://java.sun.com/xml/ns/javaee"
 xmlns:xi="http://www.w3.org/2001/XInclude"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd">
 <managed-bean>
  <managed-bean-name>employee</managed-bean-name>
  <managed-bean-class>EmployeeBean</managed-bean-class>
  <managed-bean-scope>request</managed-bean-scope>
 </managed-bean>
 <navigation-rule>
  <from-view-id>/submitting.jsp</from-view-id>
  <navigation-case>
   <from-outcome>accept</from-outcome>
   <to-view-id>/accept.jsp</to-view-id>
  </navigation-case>
  <navigation-case>
   <from-outcome>reject</from-outcome>
   <to-view-id>/reject.jsp</to-view-id>
  </navigation-case>
 </navigation-rule>
</faces-config>


Die jsp-Klassen:


submitting.jsp
Code: 
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<f:view>
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
		<title>Submitt</title>
	</head>
	<body>		
			<TABLE BORDER=5 ALIGN="CENTER">
				<TR><TH CLASS="TITLE">Submitting Bean Properties</TH></TR>
			</TABLE>
			<h:form>				
				Your first name:<h:inputText value="#{employee.name.firstName}"/>
				<BR>
				Your last name:<h:inputText value="#{employee.name.lastName}"/>
				<BR>
				Name of your company:<h:inputText value="#{employee.company.companyName}"/>
				<BR>
				Business area of your company:<h:inputText value="#{employee.company.business}"/>
				<BR>
				<h:commandButton value="Process" action="#{employee.processEmployee}"/>
			</h:form>		
	</body>
</html>
</f:view>


accept.jsp:
Code: 
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<f:view>
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
		<title>Accepted</title>
	</head>
	<body>	
		<TABLE BORDER=5 ALIGN="CENTER">
			<TR><TH CLASS="TITLE">Employee accepted</TH></TR>
		</TABLE>
		<UL>
			<LI>Employee's first name:<h:outputText value="#{employee.name.firstName}"/>
			<LI>Employee's last name:<h:outputText value="#{employee.name.lastName}"/>
			<LI>Name of employee's company:<h:outputText value="#{employee.company.companyName}"/>
			<LI>Business area of employee's company:<h:outputText value="#{employee.company.business}"/>
		</UL>
		Congratulations!		
	</BODY>
</HTML>
</f:view>

reject.jsp:
Code: 
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<f:view>
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
		<title>Rejected</title>
	</head>
	<body>	
		<TABLE BORDER=5 ALIGN="CENTER">
			<TR><TH CLASS="TITLE">Employee rejected</TH></TR>
		</TABLE>
		<UL>
			<LI>Employee's first name:<h:outputText value="#{employee.name.firstName}"/>
			<LI>Employee's last name:<h:outputText value="#{employee.name.lastName}"/>
			<LI>Name of employee's company:<h:outputText value="#{employee.company.companyName}"/>
			<LI>Business area of employee's company:<h:outputText value="#{employee.company.business}"/>
		</UL>
		Go Away!		
	</BODY>
</HTML>
</f:view>

Fehlermeldung:
Code: 
SCHWERWIEGEND: View State cannot be reconstructed
javax.faces.FacesException: javax.faces.application.ViewExpiredException
	at org.apache.myfaces.shared_impl.util.StateUtils.decrypt(StateUtils.java:488)
	at org.apache.myfaces.shared_impl.util.StateUtils.reconstruct(StateUtils.java:376)
	at org.apache.myfaces.renderkit.html.HtmlResponseStateManager.getSavedState(HtmlResponseStateManager.java:187)
	at org.apache.myfaces.renderkit.html.HtmlResponseStateManager.getState(HtmlResponseStateManager.java:139)
	at org.apache.myfaces.application.jsp.JspStateManagerImpl.restoreView(JspStateManagerImpl.java:349)
	at org.apache.myfaces.application.jsp.JspViewHandlerImpl.restoreView(JspViewHandlerImpl.java:515)
	at org.apache.myfaces.lifecycle.RestoreViewExecutor.execute(RestoreViewExecutor.java:85)
	at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:103)
	at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:76)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:183)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Unknown Source)
Caused by: javax.faces.application.ViewExpiredException
	at org.apache.myfaces.shared_impl.util.StateUtils.decrypt(StateUtils.java:481)
	... 21 more
07.01.2011 11:30:16 javax.faces.webapp._ErrorPageWriter handleThrowable
SCHWERWIEGEND: An exception occurred
javax.faces.application.ViewExpiredException: /submitting.facesNo saved view state could be found for the view identifier: /submitting.faces
	at org.apache.myfaces.lifecycle.RestoreViewExecutor.execute(RestoreViewExecutor.java:88)
	at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:103)
	at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:76)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:183)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Unknown Source)

Ich wäre euch für jede Hilfe dankbar !!
LG, Crombix.
 
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