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">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <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></web-app>

<%@taglib uri="/struts-tags" prefix="s"%>
<s:actionerror/>
<s:form action="login">
<s:textfield name="name" label="Name"/>
<s:password name="password" 
label="Password"/>
<s:submit value="Login"/>
</s:form>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-
//Apache Software Foundation//DTD Struts Configuration
2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="demo" extends="struts-default">
<action name="login" class="org.r4r.LoginAction">
<result name="success">/hello.jsp</result>
<result name="input">/index.jsp</result>
<result name="error">/index.jsp</result>
</action>
</package>
</struts> 

package org.r4r;
import com.opensymphony.xwork2.ActionSupport;
public class LoginAction extends ActionSupport {
private static final long serialVersionUID = 1L;
private String name;
private String password;
DAO dao=new DAO();
public void validate(){
if(name.length()==(0))
this.addFieldError("name", "Name is required");
if(password.length()==(0))
this.addFieldError("password", "Password is required");
}
public String execute(){
if(dao.find(getName(),getPassword()))
return "success";
else
this.addActionError("Invalid username and password");
return "error";
}
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;
}
}

packageorg.r4r;
import java.sql.*;
public class DAO {
public boolean find(String name,String password){
try{ 			
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con=DriverManager.getConnection	
("jdbc:oracle:thin:@localhost:1521:xe",
	"system","system");
PreparedStatement stmt=con.prepareStatement
("select * from userlist where name=? and address=?");
stmt.setString(1,name);
stmt.setString(2,password);
ResultSet rset=stmt.executeQuery();
if(rset.next())
return true;
}catch(Exception e){
System.out.println(e);
}
return false;
}
} 

<%@taglib uri="/struts-tags" prefix="s"%>
<b>Welcome,<s:property value="name"/></b>