EL expressions are not interpreted when opening JSF page as

Question

I am new to JSF. I am using jsf on tomcat6 platform. I created my first test program with following file contents:

hoem.xhtml

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
   <title>JSF Tutorial!</title>
</head>
<body>
   #{userData.msg}
</body>
</html>

UserData.java

import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;

@ManagedBean(name = "userData", eager = true)
@RequestScoped

public class UserData {
    private String msg = "Hello";

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

}

faces-config.xml

<?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_1_2.xsd"
    version="1.2">

  <managed-bean>
<managed-bean-name>userData</managed-bean-name>
<managed-bean-class>UserData</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
  </managed-bean>
</faces-config>

and finally part of web.xml file:

<display-name>Z</display-name>
  <welcome-file-list>
    <welcome-file>home.xhtml</welcome-file> //Warning:file name references to "home.xhtml" that is not a page 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>

I am getting following output:

#{userData.msg}

Expected Output is:

Hello

Please help me to solve this problem. thanks in advance.

How do you access the application in the browser? The problem appears because you don't access the application with the URL pattern(*faces* in your case) for the Faces Servlet. — Seitaridis, Sep 17 '14 at 10:58
Your URL should be something like: http://localhost:8080/application_name/faces/home.xhtml. — Seitaridis, Sep 17 '14 at 11:07
A good starting point for learning JSF is http://stackoverflow.com/tags/jsf/info. — Seitaridis, Sep 17 '14 at 11:09
man this is one confusing example. I see JSF 2.x annotations on the backing bean yet the application is configured as JSF 1.2, with duplicate mappings in the faces-config for that backing bean. Copy/paste/everyone can do programming from different sources on the net? — Gimby, Sep 17 '14 at 11:12
@Seitaridis after running using url: http://localhost:8080/Z/faces/home.xhtml. I am getting error saying:"java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config Caused by: java.lang.ClassNotFoundException - javax.servlet.jsp.jstl.core.Config" — user3189037, Sep 17 '14 at 11:31

Yubaraj · Answer 1 · 2014-09-18T12:42:47.293

As far as I know you can not use only #{userData.msg}. I think you got following exception.

{...} not allowed in a template text body

so you have to use <h:outputText value="#{userData.msg}"/> instead of only #{userData.msg} in your .xhtml page.

Updated:

Yes I was confused like BalusC said in comment JSP with Facelets. Above answer is correct if this was in JSP. Now I got solution by reading many examples. I tasted and succeed. Following is the full details.

Netbeans IDE
Tomcat 6
Jar files
- jsf-api-2.1.7.jar
- jsf-api-2.0.jar
- jsf-impl-2.1.7.jar

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
     http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.tutorialspoint.test</groupId>
<artifactId>helloworld</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>helloworld Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-api</artifactId>
        <version>2.1.7</version>
    </dependency>
    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-impl</artifactId>
        <version>2.1.7</version>
    </dependency>
    <dependency>
        <groupId>javax.faces</groupId>
        <artifactId>jsf-api</artifactId>
        <version>2.0</version>
        <scope>provided</scope>
    </dependency>
</dependencies>
<build>
    <finalName>helloworld</finalName>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.1</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
            </configuration>
        </plugin>
    </plugins>
</build>        
</project>

web.xml

<?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">
<welcome-file-list>
    <welcome-file>faces/home.xhtml</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>
<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>
</web-app>

UserData.java Managed Bean

import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;

@ManagedBean
@RequestScoped
public class UserData {

private String msg = "Hello";

public UserData() {
}

public String getMsg() {
    return msg;
}

public void setMsg(String msg) {
    this.msg = msg;
}
}

home.xhtml

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
  xmlns:h="http://java.sun.com/jsf/html">
<h:head>
    <title>Facelet Title</title>
</h:head>
<h:body>
    #{userData.msg}
</h:body>
</html>

Reference

JSF Quick Guide

I did not explain here because it is completely explained on above reference link. And I highly recommend you to see here for JSF which is best blog.

No. It's not the problem. If I run only home.xhtml, then it is giving me proper output. — user3189037, Sep 17 '14 at 11:17
You're confusing JSP with Facelets. OP is using Facelets. JSP has been succeeded by Facelets almost 5 years ago. The same applies to whoever upvoted this wrong answer. — BalusC, Sep 17 '14 at 11:37
@BalusC yes sir I was confused. Thank you for your remind. I found solution and updated answer. Finally I learned this but exactly what was the problem I could not find. Just solved. :) — Yubaraj, Sep 18 '14 at 12:47

EL expressions are not interpreted when opening JSF page as

1 Answers1

{...} not allowed in a template text body

Reference