STRUS2 Custom Validation example

Note: Put all  xml and java files into your src folder

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.devMode" value="true" />
    <package name="default" extends="struts-default">
        <action name="loginAction" class="LoginAction">
            <result name="success">Welcome.jsp</result>
            <result name="input">Login.jsp</result>
        </action>
    </package>
</struts>

 
validator.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator Config 1.0//EN" "http://www.opensymphony.com/xwork/xwork-validator-config-1.0.dtd">

<validators>
    <validator name="alphabetsOnly" class="EliteValidator" />
    <validator name="digitsOnly" class="EliteValidator" />
</validators>

Login-Action.validation.xml

<!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.2//EN" "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
   
<validators>
   
    <field name="username">
       
        <field-validator type="requiredstring">
            <message>Empty Username !</message>            
        </field-validator>
       
       
        <field-validator type="alphabetsOnly">
            <message>Digits not allowed in Username</message>            
        </field-validator>
       
    </field>
   
    <field name="password">
       
        <field-validator type="requiredstring">
            <message>Empty Password !</message>            
        </field-validator>
       
    </field>
   
    <field name="mobileNumber">
       
        <field-validator type="requiredstring">
            <message>Empty Mobile Number !</message>            
        </field-validator>
               
        <field-validator type="digitsOnly">           
            <message>Alphabets not allowed in Mobile Number</message>            
        </field-validator>
       
    </field>
   
</validators>

LoginAction.java

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport{
   
    private String username;
    private String password;
    private String mobileNumber;
   
    /**
     * @return the username
     */
    public String getUsername() {
        return username;
    }
    /**
     * @param username the username to set
     */
    public void setUsername(String username) {
        this.username = username;
    }
    /**
     * @return the password
     */
    public String getPassword() {
        return password;
    }
    /**
     * @param password the password to set
     */
    public void setPassword(String password) {
        this.password = password;
    }
    /**
     * @return the mobileNumber
     */
    public String getMobileNumber() {
        return mobileNumber;
    }
    /**
     * @param mobileNumber the mobileNumber to set
     */
    public void setMobileNumber(String mobileNumber) {
        this.mobileNumber = mobileNumber;
    }

}

EliteValidator.java


import com.opensymphony.xwork2.validator.ValidationException;
import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport;

public class EliteValidator extends FieldValidatorSupport{

    @Override
    public void validate(Object object) throws ValidationException {
            System.out.println("INSIDE VALIDATE OF ELITEVALIDATOR");
           
            String fieldName = getFieldName();
            String fieldValue = (String)getFieldValue(fieldName, object);
           
            System.out.println("FieldName: "+fieldName);
            System.out.println("fieldValue: "+fieldValue);
           
            if(fieldName.equalsIgnoreCase("username") && fieldValue.matches(".*\\d.*")){
                System.out.println("Found numbers in username");
                addFieldError(fieldName, object);
               
            } else if(fieldName.equalsIgnoreCase("mobileNumber") && (fieldValue.matches(".*\\d.*")==false)){
                System.out.println("Found Alphabets in mobileNumber");
                addFieldError(fieldName, object);
            }
           
            return;
    }

}

Note: PUT JSP IN THE WEBCONTEXT FOLDER OF YOUR APP
Login.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Login</title>
<style>
    .errorMessage{
        color:red;
        font-size: 11px;
        text-align:right;
    }
</style>
</head>
<body>
    <center>
        <s:form action="loginAction" method="post" validate="true" >
            <s:textfield     name="username" label="Username"    />
            <s:textfield     name="password" label="Password"    />
            <s:textfield      name="mobileNumber" label="Mobile Number"/>
            <s:submit/>
        </s:form>
    </center>
</body>
</html>

Welcome.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
    WELCOME TO CUSTOM VALIDATION DEMO PROJECT
</body>
</html>