Validation using Struts2 Framework and validation.xml file on Radio button and DropDownList with Eclipse IDE : Love Java Bytes

In this Tutorial we are performing server side validation using Struts2 framework on various fields eg. name,radio button and dropdownlist.

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Web Deployment Assembly

fillform.jsp
create a user input page.

 <%@ page language="java" contentType="text/html; charset=ISO-8859-1"  
      pageEncoding="ISO-8859-1"%>  
      <%@ taglib prefix="s" uri="/struts-tags"%>  
      <!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>Register</title>  
 </head>  
 <body bgcolor="brown">  
      <h1>Registration</h1>  
      <hr>  
            <s:form action="register.action" method="post" >  
            <s:textfield name="Name" label="Name" size="20" />  
            <s:radio name="Gender" label="Gender" list="{'Male', 'Female'}" />  
            <s:select name="Course" label="Course" list="{'Select-Option','B.Tech', 'MCA', 'MSC'}" />  
            <s:submit label="Register" align="center" />  
         </s:form>  
 </body>  
 </html>

success.jsp

create a user's success page.

 <%@ page language="java" contentType="text/html; charset=ISO-8859-1"  
   pageEncoding="ISO-8859-1"%>  
   <%@ taglib prefix="s" uri="/struts-tags"%>  
 <!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>success</title>  
 </head>  
 <body bgcolor="lightblue">  
 <center><h3>  
 Hello! <s:property value="name"/></h3></center>  
 </body>  
 </html>

ContactAction.java

create a Action java class.

 package in.blog.webideaworld;  
 import com.opensymphony.xwork2.ActionSupport;  
 @SuppressWarnings("serial")  
 public class ContactAction extends ActionSupport {  
      private String name;  
      private String gender;  
      private String course;  
      public String getName() {  
           return name;  
      }  
      public void setName(String name) {  
           this.name = name;  
      }  
      public String getGender() {  
           return gender;  
      }  
      public void setGender(String gender) {  
           this.gender = gender;  
      }  
      public String getCourse() {  
           return course;  
      }  
      public void setCourse(String course) {  
           this.course = course;  
      }  
      public String execute() throws Exception{  
           return SUCCESS;  
      }  
 }

ContactAction-validation.xml

Create validators in XML file and the format for the validatiors xml file is <ActionClassName>-validation.xml

 <!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.3//EN"  
           "http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">  
 <validators>  
      <field name="Name">  
           <field-validator type="requiredstring">  
                <message>Name is Required.</message>  
           </field-validator>  
           <field-validator type="regex">  
       <param name="expression">[a-zA-Z]{2,20}</param>  
       <message>Please enter valid name.</message>  
     </field-validator>  
      </field>  
      <field name="Gender">  
           <field-validator type="requiredstring">  
                <message>Gender is Required.</message>  
           </field-validator>  
      </field>  
      <field name="Course">  
           <field-validator type="regex">  
       <param name="expression">B.Tech|MCA|MSC</param>  
       <message>Course is required.</message>  
     </field-validator>  
      </field>  
 </validators>

struts.xml

set result name="success" for success.jsp and name="input" for fillform.jsp for validation messages to show up on input page.

 <?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>   
   <package name="default" namespace="/" extends="struts-default">  
     <action name="register" class="in.blog.webideaworld.ContactAction" method="execute" >  
     <result name="success">success.jsp</result>  
     <result name="input">fillform.jsp</result>  
     </action>  
   </package>  
   </struts>

web.xml

 <?xml version="1.0" encoding="UTF-8"?>  
 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">  
  <display-name>Struts2Validate_form</display-name>  
  <welcome-file-list>  
   <welcome-file>fillform.jsp</welcome-file>  
   </welcome-file-list>  
  <filter>  
    <filter-name>struts2</filter-name>  
    <filter-class>  
      org.apache.struts2.dispatcher.FilterDispatcher  
    </filter-class>  
   </filter>  
   <filter-mapping>  
    <filter-name>struts2</filter-name>  
    <url-pattern>/*</url-pattern>  
   </filter-mapping>  
 </web-app>

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Validation using Struts2 Framework and validation.xml file on Radio button and DropDownList with Eclipse IDE

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