Validating User Input - Stripes...and Java Web Development is Fun Again - page 64

wouldn't be nice to welcome the user to the form with validation error
messages! With on= "save", required-field validations are restricted to
save ( ) and so do not cause errors in form ( ).

Once in the form, the user may very well enter invalid values and then
click the Cancel button. You need to turn off all validations by anno-
tating cancel ( ) with @DontValidate so that the user will be allowed to
cancel the form even if the input is not valid.

Whew. . . enough theory. Let's look at some examples.

4.2 Using Built-in Validations

Let's get back to our webmail application. We have a form to enter a
contact's information, displayed by contact_form.jsp :

Download email_06/web/WEB-INF/jsp/contact_form.jsp
<s:form beanclass="${actionBean.class}">
<div><s:hidden name="contact.id"/></div>
<table class="form">
<tr>
<td> Email: </td>
<td>
<s:text name="contact.email" class="required"/>
</td>
</tr>
<!--Same for First and Last name, Phone number, Birth date-->
<tr>
<td> &nbsp; </td>
<td>
<s:submit name="save" value="Save"/>
<s:submit name="cancel" value="Cancel"/>
</td>
</tr>
</table>
</s:form>

ContactFormActionBean sends the user to the form and handles the form
submission:

Download email_06/src/stripesbook/action/ContactFormActionBean.java
package stripesbook.action;
public class ContactFormActionBean extends ContactBaseActionBean {
private static final String FORM="/WEB-INF/jsp/contact_form.jsp";

@DefaultHandler
public Resolution form() {
return new ForwardResolution(FORM);

}