Client Side Address Validation in Struts
In this lesson we will create JSP page for entering the address and use the
functionality provided by Validator Framework to validate the user data on the
browser. Validator Framework emits the JavaScript code which validates the user
input on the browser. To accomplish this we have to follow the following steps:
1. Enabling the Validator plug-in: This makes the Validator available to the
system.
2. Create Message Resources for the displaying the error message to the user.
3. Developing the Validation rules We have to define the validation rules in the
validation.xml for the address form. Struts Validator Framework uses this rule
for generating the JavaScript for validation.
4. Applying the rules: We are required to add the appropriate tag to the JSP for
generation of JavaScript.
5. Build and test: We are required to build the application once the above steps
are done before testing.
Enabling the Validator plug- in
To enable the validator plug-in open the file struts-config.xml and make sure that
following line is present in the file.
<!-- Validator plugin -->
<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property
property="pathnames"
value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml"/>
</plug-in>
Creating Message Resources
Message resources are used by the Validator Framework to generate the validation
error messages. In our application we need to define the messages for name, Address
and E-mail address. Open the Struts\strutstutorial\web\WEB-
INF\MessageResources.properties file and add the following lines:
AddressForm.name=Name
AddressForm.address=Address
AddressForm.emailAddress=E-mail address
Developing Validation rules
In this application we are adding only one validation that the fields on the form
should not be blank. Add the following code in the validation.xml.
<!-- Address form Validation-->
<form name="AddressForm">
<field property="name"
depends="required">
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