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pushbutton problem

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posted 13 years ago

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Hi even though it is very simple application i am not able to display my values in the next page

please let me know where the bug exists in my code,

i am using Eclipse: Version: 3.4.1
Tomcat:6.0.1
JDK 1.6

index.jsp
-------

<%@taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<f:view>
     <h:inputText value="#{user.uname}" />
     
        <h:commandButton value="OK" action="helloButton" />

</f:view>

HelloJSF.jsp
-----------

<%@taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<f:view>

<h:outputText value="#{user.uname}" />
</f:view>

User.java
--------

package com.test;

import java.io.Serializable;

public class User  implements Serializable{
 public String getUname() {
		return uname;
	}

public void setUname(String uname) {
		this.uname = uname;
	}

private String uname;
}

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">

<navigation-rule>
				<from-view-id>/index.jsp</from-view-id>
				<navigation-case>
				<from-outcome>helloButton</from-outcome>
				<to-view-id>/HelloJSF.jsp</to-view-id>
				</navigation-case>
</navigation-rule>
        
	<managed-bean>
		<managed-bean-name>user</managed-bean-name>
		<managed-bean-class>com.test.User</managed-bean-class>
		<managed-bean-scope>session</managed-bean-scope>
	</managed-bean>

</faces-config>

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>samplejsf</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>*.jsf</url-pattern>
  </servlet-mapping>
</web-app>

Bauke Scholtz

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posted 13 years ago

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Check the generated HTML output.
Don't you miss something?

Or don't you know HTML either?

Bauke Scholtz

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posted 13 years ago

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Rauhl Roy wrote:i am using Eclipse: Version: 3.4.1

By the way, it's odd that Eclipse didn't show any warning regard to the commandButton. Or did you miss it? Or didn't you add the JSF facet to the web project?

Rauhl Roy

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posted 13 years ago

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Hi,

I have checked this application by all means, in fact I followed your tutorial only, the example you gave on your blog was running like anything. But it never worked even I added one more page to your application and tried to display values from the main page.

And one more thing is, are we supposed to write all HTML tags in every JSF page?

And Eclipse does not show any thing on console is there any place where we can see log file of JSP.

thanks in advance,

Rahul

Bauke Scholtz

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posted 13 years ago

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In HTML, the <input> element is to be placed inside a ... element?
Hint: http://www.w3schools.com/html/html_forms.asp

Now, do the same in JSF. It also has a component for it. If you configured Eclipse the way as in my tutorial, you should see a warning around the h:commandButton element that it is missing some required parent component.

And one more thing is, are we supposed to write all HTML tags in every JSF page?

No, but knowledge of HTML is fairly important. Simply because JSF generates HTML.

Rauhl Roy

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posted 13 years ago

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a million thanks from otherwise wise guy

Bauke Scholtz

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posted 13 years ago

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You´re welcome.

Rauhl Roy

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I did same as you did in your blog these are the error/ warning which are shown on the console of eclipse IDE,
please let m know how to solve the problem.

Bauke Scholtz

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This is not an error. This is a warning. Stuff should just work.

This warning comes because eclipse modifies the Tomcat´s server.xml to add the module contexts (web projects) and Eclipse is using a new attribute 'source' to indicate the web project location in Eclipse. When Tomcat starts up, it will validate the XML and it will show warnings when it encounters unknown tags or attributes.

Those warnings doesn´t harm. You can just ignore it. If you really want to get rid of it, doubleclick the Tomcat server entry in Eclipse to get its configuration and under 'Server Options' enable the 'Publish module contexts to separate XML files' option.

Rauhl Roy

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posted 13 years ago

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you are the best, a million thanks

Bauke Scholtz

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posted 13 years ago

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You´re welcome.

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