custom validators training

8/10/2019 Custom Validators Training

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Custom Validators



Struts Validator framework provides manyvalidation rules that can be used in the webapplications.The client-side validation in Struts is well known.Some of the available features:

requiredrequiredifvalidwhenminlengthmaxlengthmaskbyteshortintegerlongfloatDoublecreditCardemailurl

byteLocaleshortLocaleintegerLocalelongLocalefloatLocaledoubleLocaledateintRangelongRangefloatRangedoubleRange



Edit validator-rules.xml and add the required code forthe new rule.

<validator name="matchname"classname="org.apache.struts.validator.FieldChecks"method="validateName"methodParams="java.lang.Object,

org.apache.commons.validator.ValidatorAction,org.apache.commons.validator.Field,org.apache.struts.action.ActionMessages,org.apache.commons.validator.Validator,

javax.servlet.http.HttpServletRequest"

msg="errors.name">

Creating a new Validator “matchname” is

the new validatorcreated

Error message issuedin the browser

Edit validation.xml and add:

<form-validation><formset><form name="AdminForm">

<field property="name"depends="matchname">

<arg0 key="AddressForm.name"/></field>

</form>

</formset></form-validation>



Edit struts-configuration.xml and add:form-bean name="AdminForm" type="test.AdminForm"/>

<action

path="/AdminFormValidation"type="test.AdminForm"name="AdminForm"scope="request"validate="true"input="admin.jsp">

<forward name="success" path="success.jsp"/></action>

<message-resources parameter="resources/application"/>

<plug-in className="org.apache.struts.validator.ValidatorPlugIn">

<set-propertyproperty="pathnames"value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml"/>

</plug-in>



Create a JSP file<%@ taglib uri="struts-bean.tld" prefix="bean" %>

<%@ taglib uri="struts-html.tld" prefix="html" %>

<html:html><head><title>Administrator Test</title>

<html:base/></head><body bgcolor="white"><html:form action="/AdminFormValidation" method="post"onsubmit="return validateAdminForm(this);">

<div align="left"><p>This application shows the use of Struts Validator.<br>The following form contains fields that are processed by Struts

Validator.<br>Fill in the form and see how JavaScript generated by ValidatorFramework validates the form.</p>

<p><html:errors/></p> Continued …

<table><tr><td align="right"><b>Name</b></td><td align="left"><html:text property="name" size="30" maxlength="30"/></td></tr><tr><td align="right"><html:submit>Save</html:submit></td>

<td align="left"><html:cancel>Cancel</html:cancel></td></tr></table></div>

<html:javascript formName="AddressForm"/></html:form></body>

</html:html>



Create the Java Class for the AdminFormCreate the success.jsp

Create the AdminAction.java

custom validators training

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