CODEWITHSUNDEEP
javajsf
FLBKernel
FLBKernel

Reputation: 860

JSF and Maven simple example. Unable to print managed bean message to the xhtml

I am new in JSF and I am trying to do a basic exercise: Print a ManagedBean message on xhtml file. I've searched some information that can help me but no luck.

This is how my files look like:

EngineController.java (where my managed bean is)

    package java;

    import java.io.Serializable;

    import javax.faces.bean.ManagedBean;
    import javax.faces.bean.ManagedProperty;
    import javax.faces.bean.SessionScoped;

    @ManagedBean(name = "engineController")
    @SessionScoped
    public class EngineController implements Serializable {

    @ManagedProperty(value = "#{msgTurnOnBtn}")
    private String msgTurnOnBtn = "Encender";

    public String getMsgTurnOnBtn() {
        System.out.println(msgTurnOnBtn);
        return msgTurnOnBtn;
    }

    public void setMsgTurnOnBtn(String msgTurnOnBtn) {
        this.msgTurnOnBtn = msgTurnOnBtn;
    }
}

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:f="http://java.sun.com/jsf/core"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:h="http://java.sun.com/jsf/html">

    <h:head>
        <title>Primera Practica</title>
    </h:head>
    <h:body>
        <h:form>
            <h2>Motor</h2>
            <h:outputText value="#{engineController.msgTurnOnBtn}" />
            <h:commandButton id="turnOnBtn" 
                             value="#{engineController.msgTurnOnBtn}"
                             >
            </h:commandButton>
        </h:form>
    </h:body>
</html>

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">

    <display-name>Practica1</display-name>

    <!-- Change to "Production" when you are ready to deploy -->
    <context-param>
        <param-name>javax.faces.PROJECT_STAGE</param-name>
        <param-value>Development</param-value>
    </context-param>

    <!-- Welcome page -->
    <welcome-file-list>
        <welcome-file>faces/home.xhtml</welcome-file>
    </welcome-file-list>

    <!-- JSF mapping -->
    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!-- Map these files with JSF -->
    <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>

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.mycompany</groupId>
    <artifactId>Practica1</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>Practica1 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>
            <type>jar</type>
        </dependency>

        <dependency>
            <groupId>com.sun.faces</groupId>
            <artifactId>jsf-impl</artifactId>
            <version>2.1.7</version>
        </dependency>

        <!-- Tomcat 6 need this -->
        <dependency>
            <groupId>com.sun.el</groupId>
            <artifactId>el-ri</artifactId>
            <version>1.0</version>
        </dependency>

    </dependencies>

    <build>
        <finalName>Practica1</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>

So the problem is that I can't see the message within #{engineController.msgTurnOnBtn} on my home.xhtml file.

By the way, one of my colleague has implemented another code that looks the same way and I am able to execute with no problems.

Thanks in advance, guys :)

Upvotes: 0

Views: 590

Answers (1)

Raphael Roth
Raphael Roth

Reputation: 27373

  • change the name of your package to something other than "java"
  • don't put @ManagedProperty(value = "#{msgTurnOnBtn}") on your String property

Upvotes: 2

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