Three tier application

Three Tier Architecture
//datainsert.java
import java.io.*;
import java.lang.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class datainsert extends
HttpServlet{
public void doPost(HttpServletRequest req,HttpServletResponse res)
throws ServletException, IOException
{
res.setContentType("text/html");
PrintWriter pw = res.getWriter();
Connection connection;
try{
String first1=req.getParameter("fname");
String last1=req.getParameter("lname");
String pass1=req.getParameter("pass");
String cpass1=req.getParameter("cpass");
String phno1=req.getParameter("phno");
String emailid1=req.getParameter("email");
String gender1=req.getParameter("gender");
String area1=req.getParameter("area");
String sel1=req.getParameter("sel");

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
connection = DriverManager.getConnection("jdbc:odbc:regdsn1"," "," ");
PreparedStatement pst = connection.prepareStatement("insert into regtable1
values(?,?,?,?,?,?,?,?,?)");
pst.setString(1,first1);
pst.setString(2,last1);

pst.setString(3,pass1);
pst.setString(4,cpass1);
pst.setString(5,phno1);
pst.setString(6,emailid1);
pst.setString(7,gender1);
pst.setString(8,area1);
pst.setString(9,sel1);

int i = pst.executeUpdate();
if(i!=0){
pw.println("<br>Record has been inserted");
}
else{
pw.println("failed to insert the data");
}
}
catch (Exception e){
pw.println(e);
}
}
}
//dataretrive.java
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
public class dataretrive extends HttpServlet
{
public void doGet(HttpServletRequest req,HttpServletResponse res)
throws ServletException, IOException
{
/* database connection*/

try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection
con=DriverManager.getConnection("jdbc:odbc:regdsn1","","");

PrintWriter out=res.getWriter();
//out.println("<p> connection established</p>");
String first1=req.getParameter("fname");

Statement stmt=con.createStatement();
ResultSet rs=stmt.executeQuery("select * from regtable1
where firstname='"+first1+"'");
if (!rs.next())
{
out.println("<html><head><title>
Hello</title></head><body> <h1>Incorrect Username and password
</h1></body><html>");
}
else
{
out.println("<html><head><title> Hello</title></head>");
out.println("<body><p> <h1>welcome to"+" "+
req.getParameter("fname")+"</h1></p>");
out.println("<table
border=2><tr><th>REGISTERDFIELDS</th><th>VALUE</th></tr>");
out.println("<tr><td>FIRST NAME</td><td>");
out.println(rs.getString(1));
out.println("</td></tr><td>LAST NAME</td><td>");
out.println("</td></tr><td>PASSWORD</td><td>");
out.println("</td></tr><td>CPASSWORD</td><td>");
out.println("</td></tr><td>PHONENUMBER</td><td>");
out.println("</td></tr><td>EMAIL-ID</td><td>");
out.println("</td></tr><td>GENDER</td><td>");
out.println("</td></tr><td>ADDRESS</td><td>");
out.println("</td></tr><td>STATE</td><td>");
out.println("</td></tr></table>");

}
rs.close();
con.close();
out.close();
}
catch(Exception e)
{
e.printStackTrace();
}

}
}
dataretrive.html
<html>
<head>
<title>Login Page</title>
</head>
<body>
<form method="GET" action="/dataretrive">
<p>Enter Name:       <input type="text"
name="fname" size="20"></p>
<input type="submit" value="Submit" name="B1"></p>
</form>
</body>
</html>
userregistration.html
<DOCTYPE html>
<head>
<title>REGISTRATION PAGE</TITLE>
<script type="text/javascript">
function validation()
{
var a = document.form.fname.value;
var b = document.form.lname.value;
var password=document.form.pass.value;

alert("Phone no. cannot be left
blank");
document.form.phno.focus();
return false;
}

if(isNaN(c)|| c.indexOf(" ")!=-1)
{
alert("Enter numeric value");
return false;
}
if (c.length < 10)
{
alert("enter 10 characters");
return false;
}
if(reg.test(address) == false) {
alert('Invalid Email Address');
return false;
}
if ( ( form.gender[0].checked == false ) && (
form.gender[1].checked == false ) )
{
alert ( "Please choose your Gender: Male or Female" );
return false;
}
if (ErrorText= "") { form.submit() }
}
</script>
</head>
<body bgcolor="#E6E6FA">
<table>
<form name="form" method="POST" action="/datainsert" onsubmit="return
validation()">

<tr><td><STRONG><b><font
color="green">REGISTRATION:</font><b></STRONG></td></tr>
<tr><td><font color="blue">First Name</font><font
color="red">*:</font></td>
<td><input type="text" name="fname" size=20></td></tr>
<tr><td><font color="blue">Last Name</font><font
color="red">*:</font></td><td><input type="text" name="lname"
size=20></td></tr>
<tr><td><font color="blue">Password</font><font
color="red">*:</font></td><td>
<input type="password" name="pass" size=15></td></tr>
<tr><td><font color="blue">Confirm Password</font><font
<input type="password" name="cpass" size=15></td></tr>

<tr><td><font color="blue">PhoneNo</font><font
<input type="text" name="phno" size=10></td></tr>
<tr><td><font color="blue">Email-id</font><font
<input type="text" name="email" size=10></td></tr>
<tr><td><font color="blue">Select Gender</font><font
color="red">*:<td></font><input type="radio" name="gender" value="male"><font
color="blue">MALE:</font>
<input type="radio" name="gender" value="female"><font
color="blue">FEMALE:</font></td></tr>
<tr><td><font color="blue">Address:</font></td><td><textarea
name="area" size=20></textarea></td></tr>
<tr><td><font color="blue">Select State:</font></td><td><select
name="sel">
<option name="tn">TAMILNADU</option>
<option name="ap">ANDHARA PRADESH</option>
<option name="kl">KERALA</option>
</select>
</td></tr>
<tr><td><input type="submit" name="sub" value="Submit"></td></tr>
</tr>
</form></table>
</body>
</html>

To Create ms-access database

Click on new link- click blank database--window will open

Enter database name regdb1 save in mydocuments-click on create

Clck on create table in design view

Create number of field names based on number of registrationpage fields
And close sub window it will ask save -save table name regtable1
Again it will ask primary key yer or no -click no

Now table created if u click on regtable1 it will show fields

Close all windows now go start -settings-control panel-click on
administrative tools(if suppose not there check performance and maintance)

Click on datasource

Click on add tab

Select Microsoft Access Driver(*.mdb) click finish

Enter Data Source Name regdsn1 and click select

Select database from my documents select regdb1 and click ok-ok-ok
It will close all windows now driver connection over
Step1: Create datainsert .java file and dataretrive.java and save in
C:Program Filesapache-tomcat6.0.36webappsROOTWEBINFsrcdatainsert.java
C:Program Filesapache-tomcat6.0.36webappsROOTWEBINFsrcdataretrive.java
Step2: Create userregistration.html file save in
C:Program Filesapachetomcat6.0.36webappsROOTuserregistration.html
C:Program Filesapache-tomcat6.0.36webappsROOTdataretrive.html
Step3: Compile datainsert.java and dataretrive.java
Open command prompt
C:Document and Settingsadministrator>cd
Copy and paste full path upto src
C:cd C:Program Filesapache-tomcat6.0.36webappsROOTWEBINFsrc
C:Program Filesapache-tomcat6.0.36webappsROOTWEB-INFsrc>javac
datainsert.java

C:Program Filesapache-tomcat6.0.36webappsROOTWEB-INFsrc>javac
dataretrive.java

Step4: create datainsert.classes and dataretrive.classes file in src (cut and past
in classes folder save file in this location
C:Program Filesapache-tomcat6.0.36webappsROOTWEB-INFclasses
Step5: Create web.xml file with web.xml coding give two files name
<web-apps>
<web-app>
<servlet>
<servlet-name>datainsert</servlet-name>
<servlet-class>datainsert</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>datainsert</servlet-name>
<url-pattern>/datainsert</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>dataretrive</servlet-name>
<servlet-class>dataretrive</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>dataretrive</servlet-name>
<url-pattern>/dataretrive</url-pattern>
</servlet-mapping>

</web-app>
Step6: Start apache-tomacat server double click on bin

C:Program Filesapache-tomcat6.0.36bin
Step7:after server startup open browser type url

http://localhost:8080/userregistration.html

http://localhost:8080/dataretrive.html

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