How to use validation with example need

[Jayaa Prakashh]

i am jayapraaksh i need example using validation and convertion
pl help me .

[Anu Sri]

here is an example of Email validator

Write a custom validator class EmailValidator.java with required imports,

package com.validators;
import java.util.regex.*;
 
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.*;
 
public class EmailValidator implements Validator {
 
public void validate(FacesContext facesContext, UIComponent uIComponent, Object email) throws ValidatorException {
 
String emailid = email.toString();
 
Pattern p = Pattern.compile(".+@.+\\.[a-z]+");
Matcher m = p.matcher(emailid);
boolean matchFound = m.matches();
 
if (!matchFound) {

FacesMessage facesMessage = new FacesMessage();
facesMessage.setSummary("Please Enter a Valid Email");
throw new ValidatorException(facesMessage);
}
 
}
 
}

Register the validator in faces-config.xml

<validator>
<validator-id>EmailValidator</validator-id>
<validator-class>com.validators.EmailValidator </validator-class>
</validator>

Use the validatorId in jsp to invoke the validator

<h:inputText id="Email" value="#{bean.email}" required=�true�>
<f:validator validatorId="EmailValidator"/>
</h:inputText>