Struts2 validation problems

[Jay Tai]

I'm trying to build a simple Struts2 application which validates user input making sure the user does not input blank username/ pw. The application runs correctly until it comes to the actual validation. If the user enters a blank value the validation is ignored and the SUCCESS action is rendered. It does not even seem to recognize the xml validator (RequiredTestAction-validation.xml).

I'm using Struts2.3.4 library in Netbeans 7.3. I tried to include themain code components for the application. Please let me know if I need to include any more information.

The following excerpt from the stack trace tells me I'm missing a TLD or using the wrong library, but I really don't know where to obtain the missing TLD since I'm using the latest Struts libary for my IDE?

Caused by: java.io.FileNotFoundException: http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1623)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:633)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(XMLEntityManager.java:1271)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(XMLEntityManager.java:1238)
at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(XMLDTDScannerImpl.java:260)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(XMLDocumentScannerImpl.java:1153)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(XMLDocumentScannerImpl.java:1049)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:962)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:607)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:116)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:489)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:835)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1210)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:568)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(SAXParserImpl.java:302)
at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:113)

Would really appreciate any advice in case I have not structured or coded this correctly.

WEB-INF/classes/app08a/RequiredTestAction

package app08a;
import com.opensymphony.xwork2.ActionSupport;

public class RequiredTestAction extends ActionSupport {
    private String userName;
    private String password;
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
}

WEB-INF/classes/app08a/RequiredTestAction-validation.xml

<!DOCTYPE validators PUBLIC
        "-//OpenSymphony Group//XWork Validator 1.0.2//EN"
        "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">

<validators>
    <field name="userName">
        <field-validator type="required">
            <message>Please enter a user name</message>
        </field-validator>
    </field>
    <field name="password">
        <field-validator type="required">
            <message>Please enter a password</message>
        </field-validator>
    </field>
</validators>

WEB-INF/classes/struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <constant name="struts.devMode" value="true" />

    <package name="app08a" extends="struts-default">
        <action name="Conversion1">
            <result>/jsp/Conversion.jsp</result>
        </action>
        <action name="Conversion2" class="app08a.ConversionTestAction">
            <result name="input">/jsp/Conversion.jsp</result>
            <result>/jsp/Conversion2.jsp</result>
        </action>

        <action name="Date1">
            <result>/jsp/Date.jsp</result>
        </action>
        <action name="Date2" class="app08a.DateTestAction">
            <result name="input">/jsp/Date.jsp</result>
            <result>/jsp/Thanks.jsp</result>
        </action>

        <action name="Email1">
            <result>/jsp/Email.jsp</result>
        </action>
        <action name="Email2" class="app08a.EmailTestAction">
            <result name="input">/jsp/Email.jsp</result>
            <result>/jsp/Thanks.jsp</result>
        </action>

        <action name="Expression1">
            <result>/jsp/Expression.jsp</result>
        </action>
        <action name="Expression2" class="app08a.ExpressionTestAction">
            <result name="input">/jsp/Expression.jsp</result>
            <result>/jsp/Thanks.jsp</result>
        </action>

        <action name="FieldExpression1">
            <result>/jsp/FieldExpression.jsp</result>
        </action>
        <action name="FieldExpression2" class="app08a.FieldExpressionTestAction">
            <result name="input">/jsp/FieldExpression.jsp</result>
            <result>/jsp/Thanks.jsp</result>
        </action>
        
        <action name="Int1">
            <result>/jsp/Int.jsp</result>
        </action>
        <action name="Int2" class="app08a.IntTestAction">
            <result name="input">/jsp/Int.jsp</result>
            <result>/jsp/Thanks.jsp</result>
        </action>

        <action name="RegEx1">
            <result>/jsp/RegEx.jsp</result>
        </action>
        <action name="RegEx2" class="app08a.RegExTestAction">
            <result name="input">/jsp/RegEx.jsp</result>
            <result>/jsp/Thanks.jsp</result>
        </action>

        <action name="Required1">
            <result>/jsp/Required.jsp</result>
        </action>
        <action name="Required2" class="app08a.RequiredTestAction">
            <result name="input">/jsp/Required.jsp</result>
            <result>/jsp/Thanks.jsp</result>
        </action>

        <action name="RequiredString1">
            <result>/jsp/RequiredString.jsp</result>
        </action>
        <action name="RequiredString2" class="app08a.RequiredStringTestAction">
            <result name="input">/jsp/RequiredString.jsp</result>
            <result>/jsp/Thanks.jsp</result>
        </action>

        <action name="StringLength1">
            <result>/jsp/StringLength.jsp</result>
        </action>
        <action name="StringLength2" class="app08a.StringLengthTestAction">
            <result name="input">/jsp/StringLength.jsp</result>
            <result>/jsp/Thanks.jsp</result>
        </action>

        <action name="Url1">
            <result>/jsp/Url.jsp</result>
        </action>
        <action name="Url2" class="app08a.UrlTestAction">
            <result name="input">/jsp/Url.jsp</result>
            <result>/jsp/Thanks.jsp</result>
        </action>

        <action name="Visitor1">
            <result>/jsp/Visitor.jsp</result>
        </action>
        <action name="Visitor2" class="app08a.VisitorTestAction">
            <result name="input">/jsp/Visitor.jsp</result>
            <result>/jsp/Thanks.jsp</result>
        </action>
    </package>

</struts>

/WEB-INF/web.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         version="2.5"> 

    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

      <security-constraint>
        <web-resource-collection>
            <web-resource-name>JSPs</web-resource-name>
            <url-pattern>/jsp/*</url-pattern>
        </web-resource-collection>
        <auth-constraint/>
    </security-constraint>

    <login-config>
        <auth-method>BASIC</auth-method>
    </login-config>
</web-app> 

/jsp/Required.jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>required Validator Example</title>
<style type="text/css">@import url(css/main.css);</style>
<style>
.errorMessage {
	color:red;
}
</style>
</head>
<body>
<div id="global" style="width:350px">
	<h3>Enter user name and password</h3>
	<s:fielderror/>
	<s:form action="Required2">
<%--    	<s:textfield name="userName" label="User Name"/>
--%>
    	<s:password name="password" label="Password"/>
    	<s:submit/>
	</s:form>
</div>
</body>
</html>

[Jay Tai]

Problem solved. The "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd"> is an outdated dtd declaration in the validation xml file. Replacing it with the following fixed the problem:

<!DOCTYPE validators PUBLIC
"-//Apache Struts//XWork Validator 1.0.2//EN"
"http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
// code

[khan suna]

Hi,

I followed this tutorial and everything it works well : http://www.vaannila.net/struts-2/struts-2-example/struts-2-validation-example-1.html