[jspformcode]
<form action="validation.jsp" method="POST">
 Name:<input type="text" name="name" value="" size="20" />
         <br>
         Mobile:<input type="text" name="mobile" value="" size="20" />
         <br>
         Email:<input type="text" name="email" value="" size="20" />
         <br>

       <input type="submit" value="Submit" />
       <br>
       <input type="reset" value="Reset" />
       <br>
     

[validation jsp]

<%@ page import="java.util.*" %>
<jsp:useBean id="formHandler" class="Model.formbean" scope="request">
<jsp:setProperty name="formHandler" property="*"/>
</jsp:useBean>
<%

   if (formHandler.validation())
   {
       
%>
    <jsp:forward page="jservlet"/>
<%
   }

    else
   {
%>
    <jsp:forward page="finalerror.jsp"/>
<%
   }
%>
[/validation jsp]


[formbean]
package Model;

import java.util.*;
/**
 *
 * @author knuuser
 */
public class formbean
{
    private boolean retu=false;

    private String name;
    private String mobile;
    private String email;
    

    private Hashtable errors;

    public  boolean validation()
    {
        boolean aname=validationcode.isValidname(name);
        boolean amobile=validationcode.isValidmobile(mobile);
        boolean aemail=validationcode.isEmailValid(email);
        

     if(aname==false)
       {
                errors.put("name","Please Enter Valid Name ");
       }    
     if(amobile==false)
       {
                errors.put("mobile","Enter the correct mobile number");
       }
     if(aemail==false)
       {
                errors.put("email","Please enter A Valid EmailId");
       }
     
     if(aname==true&amobile==true&aemail==true)
      {
          retu=true;
      }
        return retu;

    }

       public formbean()
         {
            name="";
            mobile="";
            email="";
            
            errors = new Hashtable();
         }
    public String getname()
         {
            return name;
         }
    public void setname(String nm)
         {
            name=nm;
         }
   
    public String getmobile()
         {
            return mobile;
         }
    public void setmobile(String mbl)
         {
            mobile=mbl;
         }
    public String getemail()
         {
            return email;
         }
    public void setemail(String eml)
         {
            email=eml;
         }
     

    public String getErrorMsg(String s)
         {
           String errorMsg =(String)errors.get(s.trim());
           return (errorMsg == null) ? "":errorMsg;
         }

    public void setErrors(String key, String msg)
         {
           errors.put(key,msg);
         }
}
[/formbean]


[validationcode]
package Model;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 *
 * @author knuuser
 */
public class validationcode
{
    public static boolean isValidname(String name)
    {
        boolean isValid=false;
        String expression="^[a-zA-Z]+$";
           CharSequence inputStr=name;
           Pattern pattern=Pattern.compile(expression);
           Matcher matcher=pattern.matcher(inputStr);
        if(matcher.matches())
        {
            isValid=true;
        }
        return isValid;
    }
    
   public static boolean isValidmobile(String mobile)
    {
        boolean isValid=false;
        String expression ="^([7-9]{1})([0-9]{1})([0-9]{8})$";
            CharSequence inputStr=mobile;
            Pattern pattern=Pattern.compile(expression);
            Matcher matcher=pattern.matcher(inputStr);
        if(matcher.matches()) {
            isValid=true;
        }
        return isValid;

    }
    public static boolean isEmailValid(String email)
    {
        boolean isValid=false;
       String expression="^[\\w\\.-]+@([\\w\\-]+\\.)+[A-Z]{2,4}$";
           CharSequence inputStr=email;
           Pattern pattern=Pattern.compile(expression,Pattern.CASE_INSENSITIVE);
           Matcher matcher=pattern.matcher(inputStr);
        if(matcher.matches()) {
            isValid=true;
        }
        return isValid;
    }
}
[/validationcode]


[jservlet]
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class jservlet extends HttpServlet
{
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException, ClassNotFoundException, SQLException
    {
        response.setContentType("text/html;charset=UTF-8");
        
        PrintWriter out = response.getWriter();
        Connection con;

        try
        {        
        String name=request.getParameter("name");
        String mobile=request.getParameter("mobile");
        String email=request.getParameter("email");

        Class.forName("oracle.jdbc.driver.OracleDriver");
        con = DriverManager.getConnection("jdbc:oracle:thin:@10.10.10.10:1521:ORADB", "empmgt", "empmgt");
       
        Statement st=con.createStatement();
        PreparedStatement ps=con.prepareStatement("insert into svpjs Values(?,?,?)");

        ps.setString(1,name);
        ps.setString(2,mobile);
        ps.setString(3,email);

        ps.executeUpdate();
        out.println("Details Entered Sucessfully");
        }


        catch (SQLException ex)
        {
            ex.printStackTrace();
        } 
        finally
        {
            out.close();
        }
    } 

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        } catch (SQLException ex) {
            ex.printStackTrace();
        }

    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
        
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
[/jservlet]