Tech I Enjoy Logo

Custom Search


spacer image Home spacer image Flex spacer image Java Technology spacer image Spring Framework spacer image Hibernate spacer image Struts spacer image Miscellaneous spacer image About spacer image Contact spacer image



  Home >> Miscellaneous 


JSF based form validation for input text
Extending an already hosted example on JSF, at JSF Example
I am going to discuss more on form text field validation
using JSF (version 1.0) as technology.

Software environment I have used for this example, so far as follows:
1. JDK 5.0.x
2. Tomcat 5.5.x
3. Eclipse 3.2
4. Apache Tomcat 6.0.18
5. List of JAR files used for this example as as follows:
   5.1. commons-beanutils.jar
   5.2. commons-collections.jar
   5.3. commons-digester.jar
   5.4. commons-logging.jar
   5.5. jsf-api.jar
   5.6. jsf-impl.jar
   5.7. jstl.jar
   5.8. standard.jar















The JSF form has two input text and secret fields, and we are
going to discuss more on how to do input text field validation
and showing error messages on screen.

index.jsp

<%@ taglib uri="http://java.sun.com/jsf/html" prefix="sampleHtml" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="sampleCore" %>
<html>
<body>
<h4>Enrollment form:</h4>
<sampleCore:view>
<sampleHtml:messages layout="table"/>
  <sampleHtml:form>
    <table>
     <tr><td>Name :</td><td><sampleHtml:inputText  value="#{SampleMGMTBean.txtName}" /></td></tr>
     <tr><td>Pass :</td><td><sampleHtml:inputSecret  value="#{SampleMGMTBean.txtPass}"/></td></tr>
     <tr><td><sampleHtml:commandButton value="Submit" action="#{SampleMGMTBean.submitButton}"/></td>
     <td><sampleHtml:commandButton value="Cancel" action="#{SampleMGMTBean.cancelButton}"/></td></tr>
    </table>
  </sampleHtml:form>
</sampleCore:view>
</body>
</html>



ButtonEventCapture.java

package sample;
/**
* This code is provided on "AS IS" basis
* @Author: Amit
* @Contact: http://www.techienjoy.com
*/
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;

public class ButtonEventCapture
{
    String txtName;
    String txtPass;

    public void setTxtName(String txtName) {
      this.txtName = txtName;
    }
    public String getTxtName() {
      return txtName;
    }
    public void setTxtPass(String txtPass) {
      this.txtPass = txtPass;
    }
    public String getTxtPass() {
      return txtPass;
    }
    public String submitButton() {
      System.out.println("Submit button is clicked...");
      System.out.println("Name: "+txtName);
      System.out.println("Pass: "+txtPass);
      if(txtName.trim().equalsIgnoreCase("")) {
        FacesContext.getCurrentInstance().
                     addMessage("name_blank", 
                     new FacesMessage(FacesMessage.SEVERITY_ERROR,
							               "Please enter name",""));
      }
      if(txtPass.trim().equalsIgnoreCase("")) {
        FacesContext.getCurrentInstance().
        addMessage("pass_blank", 
          new FacesMessage(FacesMessage.SEVERITY_ERROR,
                           "Please enter password",""));
      }
      if(txtName.length() >8) {
        FacesContext.getCurrentInstance()
                    .addMessage("name_too_large",
                    new FacesMessage(FacesMessage.SEVERITY_ERROR,
                    "Name should be lesser than 8 characters",""));
      }
      Iterator itr = FacesContext.getCurrentInstance().getMessages();
      if(itr.hasNext()) {
        FacesMessage msg = (FacesMessage) itr.next();
        List list = msg.VALUES;
        if(list.size() > 0) {
          return null;
        }
      }
       return "preview";
    }
    public String cancelButton() {
      System.out.println("Cancel button is clicked...");
      return null;
    }
}



Please note the text marked as BOLD above, the way to
add message to FacesContext to be able to show on screen.
using the Tag in index.jsp page.

All other files such as web.xml, faces-config.xml files
can be seen in the earlier JSF Example

This example can be treated as a very basic steps towards knowing
form validation using JSF, and is debatable.


Some of the screens captured with many test cases such as
1. submit button is pressed by leaving name and pass text fields
   as blank.
2. submit button is clicked by entering name as a text with 
   more than 8 characters length and leaving pass as blank.
3. submit button is clicked by entering appropriate values
   for the name and pass text fields and then seeing preview
   screen as shown below:
   

In order to run this example using browser, the URL is

http://localhost:8080/JSF-Sample/index.jsf
Here the web address is localhost, web application name is
JSF-Sample, If you try to use index.jsp or / at the end of this URL,
you may encounter error on page, as mentioned in the web.xml
file, the servlet URL mapping refers to *.jsf



If you like to share your comment/suggestions/feedback relating to this Page,
you can do so by droping us an email at usingframeworks @ gmail . com
with the subject line mentioning URL for this Page (i.e, /JSF-Example-Validation.php) or use this
LINK.
As per this website's privacy policy, we never disclose your email id,
though we shall post your comments/suggestions/feedback with
your name (optional) and date on this Page. If you don't want your
comments/suggestions/feedback to be shared in this Page, please
mention so in your email to us. Thank you very much.....
If anything missed out , please let me know at
techienjoy at yahoo . com
DOJO Dialog Example :
Example on using DOJO Dialog
explained with a very simple scenario
Android Example on Expandable List :
Example on using Expandable ListView
on Android Platform.A step by step source code
explained.
Example of using Mule ESB JMS Transport :
Example of using Mule ESB JMS Transport with simple
to explain source code.
JSF example with source code :
JSF example of Tags and checkboxes 
with source code on Java Platform.
JSF example on validation :
JSF Validation with example with source code 
on Java Platform.
Android TimePickerDialog Example :
Example on Android TimePickerDialog
explained with a very simple scenario
and appropriate screens captured and shown.
DOJO Tree Widget Example :
Example on using DOJO Tree Widget
explained with a very simple scenario
Android Text to Speech Example :
Android Example on using Text
2 Speech conversion explained with
source code Explained.
Web Load Test with example :
Example using Load test functionalities 
with code and explained
Android ImageView Example :
Example on using ImageView using 
Android Platform. A very simple to setup
and see it working.
Android Gallery with SurfaceView :
Example showing Android Gallery
with SurfaceView and Spinner
Android Menu and MenuItem Example :
Example using Menu and MenuItem using Android Platform 
with code and explained
Android ListView Example :
Example on Android List View
explained with a very simple scenario 
and article with appropriate screens 
captured and shown.
Example using Tag Library :
Example on how to code and use
Custom Tag Library on Java Platform.
Example of using Log4J Part 2 :
Log4j example with source code on Java Platform.
Android Tab View Example :
Example on Android Tab View
explained with a very simple scenario
and appropriate screens captured and shown.
JDBC Transaction Isolation Levels :
A short write-up on JDBC Transaction
Isolation showing ways to achieve
various Isolation levels using JDBC.
Android ListView Example :
Example on Android ListView and
explained with a very simple scenario 
and article with appropriate screens 
captured and shown.
Android Examples :
List of ANDROid examples
with source code and output
screens captured and shown.
Example of using Log4J Part 1 :
Log4j example with source code on Java Platform.
Android Example on Downloading AnyFormat :
Example on ways to download any file with
any format using Android Platform.
Example of using Mule ESB File Transport :
Example of using Mule ESB File Transport with simple
to explain source code.
Android Image Gradient Merge :
Example using Images and Gradient Shape using
Android Platform.
Android Gallery Example Enhanced :
Example on Android Gallery View
explained with a very simple scenario
and appropriate screens captured and shown.
Using Different Logger Files :
Example on using different log files 
using Apache Log4j Framework.
Android DatePickerDialog Example :
Example on Android DatePickerDialog
explained with a very simple scenario
and appropriate screens captured and shown.
JSF example with source code :
JSF example of Tags and Data Table 
with source code on Java Platform.
JSF example with source code :
JSF example of Tags and Code Walk-through 
with source code on Java Platform.
List of Examples on Various Technologies :
List of Examples on Various Technologies and Frameworks.
Android Layout Example :
Android Example on using Layout
with source code Explained.
Wizard Framework using Java Platform :
Example using Custom Wizard Framework 
with code and explained
Using Quartz Scheduler Example :
Example on how to use Quartz Scheduler.
JSF example with source code :
JSF example with source code on Java Platform.
Android Example on Expandable ListView :
Example on using Expandable ListView
on Android Platform.A step by step source code
explained.
Using Apache Commons Log With Example :
Example using Apache commons log 
with code and explained
Android ListView Example :
Example on Android ListView 
explained with a very simple scenario
whereby showing folder and files with
structure and appropriate screens 
captured and shown.
Android Gallery Example :
Example on Android Gallery View
explained with a very simple scenario
and appropriate screens captured and shown.
JSF example with source code :
JSF example of Tags and SelectBoxes 
with source code on Java Platform.
JSF example on Resource Bundle :
JSF example of Resource Bundle with source code 
on Java Platform.
Google GWT Example :
Example using GWT and some design patterns and various
ways of implementing this example.
Android Sensors Example :
Example on Android Sensors Listed and
explained with a very simple scenario 
and article with appropriate screens 
captured and shown.


References : 
Tags: TabHost and TabActivity Example on Android Platform
Tags: ListView Example on Android Platform
Tags: android sensors list
Tags: android listview example
Tags: android imageview example
Tags: Android example download any file sourcecode
Tags: android expandable list dynamically created example
Tags: android expandable list example
Tags: Android Gallery surfaceviews spinner
Tags: Android example download any file sourcecode
Tags: Android Layout Example
Tags: Android Text To Speech Example

Tags: DOJO Example Dialog
Tags: DOJO Example Tree Widget
Tags: different logger file log4j
Tags: JDBC Transaction isolation
Tags: event handling java code
Tags: example quartz scheduler
Tags: example tag library web application
Tags: Flex
Tags: index
Tags: inmemory image creation java awt
Tags: JSF Example Main
Tags: JSF Example Tags CheckBoxes
Tags: JSF Example Tags dataTable
Tags: JSF Example Tags SelectBoxes
Tags: JSF Example Tags Walkthrough
Tags: JSF Example Validation
Tags: JSF Resource Bundle
Tags: log4j example 1
Tags: log4j example
Tags: Miscellaneous
Tags: Mule ESB File Transport
Tags: Mule ESB JMS Transport
Tags: stream download batch
Tags: sychronized block wait notify
Tags: thread wait notify example
Tags: using apache commons log
Tags: web load test
Tags: Wizard Framework Idea Java




DISCLAIMER :
The content provided in this page is not warranted and/or guaranteed by techienjoy.com. 
techienjoy.com is not liable for any negative consequences that may result/arise from 
implementing directly/indirectly any information covered in these pages/articles/tutorials.

All contents of this site is/are written and provided on an "AS IS" basis,
without WARRANTIES or conditions of any kind, either express or implied, including, without
limitation, merchantability, or fitness for a particular purpose. You are solely responsible
for determining the appropriateness of using or refering this and assume any risks associated
with this.

In spite of all precautions taken to avoid any typo in these pages, there might be some 
issues like grammatical mistakes and typos being observed in these pages, techienjoy.com
extends sincerest apologies to all our visitors for the same.

Android Examples || Android Examples

© Copyright 2010-2012, TECHIENJOY, All Rights Reserved.      Privacy Policy     Disclaimer & Terms & Conditions