Example - 1

In the following example the Java class RegistrationForm is a Struts framework ActionForm Bean that will maintain user input data from a registration webpage for an online business site. The user will enter registration data and, through the Struts framework, the RegistrationForm bean will maintain the user data in the form fields using the private member variables. The RegistrationForm class uses the Struts validation capability by extending the ValidatorForm class and including the validation for the form fields within the validator XML file, validator.xml.

// // private variables for registration form// 
super();
// // getter and setter methods for private variables// 
private String name;private String address;private String city;private String state;private String zipcode;private String phone;private String email;public RegistrationForm() {}...public class RegistrationForm extends org.apache.struts.validator.ValidatorForm {}

The validator XML file, validator.xml, provides the validation for the form fields of the RegistrationForm.

<arg position="0" key="prompt.name"/>
<arg position="0" key="prompt.address"/>
<arg position="0" key="prompt.city"/>


<var-name>mask</var-name><var-value>[a-zA-Z]{2}</var-value><arg position="0" key="prompt.state"/><var></var>


<var-name>mask</var-name><var-value>\d{5}</var-value><arg position="0" key="prompt.zipcode"/><var></var><field property="name" depends="required"></field><field property="address" depends="required"></field><field property="city" depends="required"></field><field property="state" depends="required,mask"></field><field property="zipcode" depends="required,mask"></field><form name="RegistrationForm"></form><formset></formset><form-validation></form-validation>

However, in the previous example the validator XML file, validator.xml, does not provide validators for all of the form fields in the RegistrationForm. Validator forms are only provided for the first five of the seven form fields. The validator XML file should contain validator forms for all of the form fields for a Struts ActionForm bean. The following validator.xml file for the RegistrationForm class contains validator forms for all of the form fields.

<arg position="0" key="prompt.name"/>
<arg position="0" key="prompt.address"/>
<arg position="0" key="prompt.city"/>


<var-name>mask</var-name><var-value>[a-zA-Z]{2}</var-value><arg position="0" key="prompt.state"/><var></var>


<var-name>mask</var-name><var-value>\d{5}</var-value><arg position="0" key="prompt.zipcode"/><var></var>


<var-name>mask</var-name><var-value>^([0-9]{3})(-)([0-9]{4}|[0-9]{4})$</var-value><arg position="0" key="prompt.phone"/><var></var>
<arg position="0" key="prompt.email"/><field property="name" depends="required"></field><field property="address" depends="required"></field><field property="city" depends="required"></field><field property="state" depends="required,mask"></field><field property="zipcode" depends="required,mask"></field><field property="phone" depends="required,mask"></field><field property="email" depends="required,email"></field><form name="RegistrationForm"></form><formset></formset><form-validation></form-validation>