Upgrade web from struts 1.3 to jsf 2.0

1. Change the tile of web.xml from

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>

to:
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
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-app_2_5.xsd">

2. Add <jsp-config> before <taglib> to match the new structure of 2.5

<jsp-config>
<taglib>
<taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
<taglib-location>/WEB-INF/tld/struts/struts-bean.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
<taglib-location>/WEB-INF/tld/struts/struts-html.tld</taglib-location>
</taglib>
</jsp-config>

3. Add context-param

<context-param>
<description>
Tell the runtime where we are in the project development
lifecycle. Valid values are:
Development, UnitTest, SystemTest, or Production.
The runtime will display helpful hints to correct common mistakes
when the value is Development.
</description>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>

4. Add Faces Servlet

<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>*.jsf</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>

5. Add a blank faces-config.xml in WEB-INF

<?xml version="1.0" encoding='UTF-8'?>
<faces-config xmlns="http://java.sun.com/xml/ns/javaee"
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_2_0.xsd"
version="2.0">
</faces-config>

6. Add new jar lib of jstl 1.2 and jsf 2.0.x

jstl-api-1.2.jar
jsf-api.jar
jsf-impl.jar

Problem
In JSF 2.0 web application, during server initialization, it hits following warning message
WARNING: JSF1063: WARNING! Setting non-serializable attribute value into HttpSession (key: userBean, value class: com.jsfcompref.model.UserBean).

UserBean
package com.mkyong;

@ManagedBean(name="user")
@SessionScoped
public class UserBean{

//...
}

The “UserBean” is not serializable, Simply make this bean implement java.io.Serializable interface.

package com.mkyong;

import java.io.Serializable;

@ManagedBean(name="user")
@SessionScoped
public class UserBean implements Serializable{

//...
}