Validating email address - please help?

Question

hi,
i have registration form in jsf, and i have a field for an email address, i was wandering if anyone knows how to validate the email address, when this is submitted to a javabean, to make sure it is an actual valid email address and that both email addresses ( re-entered ) entered are the same.
so what i really want is the javacode for the javabean that can validate the email address to make sure it is valid.
any help is appreciated
thanks.

Answer 1

Here's how I did a Postal code validation:
public void validatePostalCode(FacesContext context, UIComponent toValidate, java.lang.Object inputValue) throws
ValidatorException {
Pattern pattern;
String expression = "\\D{1}\\d{1}\\D{1}\\d{1}\\D{1}\\d{1}"; // x9x9x9
String value = null;
try {
value = inputValue.toString();
pattern = Pattern.compile(expression);
this.postalCodeValidationError = !pattern.matcher(value).matches();
} catch (ClassCastException e) {
throw new ValidatorException(
new FacesMessage(
"Validation Error: Value " +
"cannot be converted to String.",
null));
if (this.postalCodeValidationError) {
// Here you do what ever you want when the validation fails
// Like generating an error in JSF ... see ValidatorException
On your JSP page add "validator="#{yourBean.validatePostalCode}"" to your inputText tag.
It would be a good idea to read on Java's regular expression stuff to fihure out the expression you need to pass to Pattern.compile(expression) in order to validate the email address.
Hope this help. Cheers