Struts

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
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">
<filter>
<filter-name>f1</filter-name>
<filter-class>org.apache.struts2.dispatcher
.FilterDispatcher
</filter-class>
</filter>
<filter-mapping>
<filter-name>f1</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation
//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="demo" 
extends="struts-default">
<action name="register"
class="mypack.RegisterAction">
<result name="success">/hello.jsp</result>
<result name="input">/index.jsp</result>
</action>
</package>
</struts>

package mypack;
import com.opensymphony.xwork2.ActionSupport;
public class RegisterAction extends 
	ActionSupport {
private String name,password,mailId;
@Override
public void validate(){
if(name.length()==0)
this.addFieldError("name",
	”Name is Required"));
if(password.length()==0)
this.addFieldError("password",
	” Password is Required"));
if(password.length()<5)
this.addFieldError("password",
	”Password length more than five digit"));
}
public String execute(){
return "success";
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getMailId() {
return mailId;
}
public void setMailId(String mailId) {
this.mailId = mailId;
}
}

<%@taglib uri="/struts-tags" prefix="s"%>
<s:form action="register">
<s:textfield name="name" label="Name"/>
<s:password name="password" 
label="Password"/>
<s:textfield name="mailId" label="MailId"/>
<s:submit value="Register"/>
</s:form>

<%@ taglib uri="/struts-tags" prefix="s"%>
<b>You are successfully registered</b>