Servlet

Servlet

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January 18, 2009 at 11:20 PM

Hi friend,

Code to help in solving the problem and remember following step :

1.Create a user login page "user.html".

<html>
<head>
</head>
<body>
<form name="userform" method="post" action="userlogin">
<br><br><br>
<table align="center" width="300px" style="background-color:#EDF6EA;border:1px solid #000000;">
<tr><td colspan=2 style="font-weight:bold;" align="center">User Login</td></tr>
<tr><td colspan=2 align="center" height="10px"></td></tr>
<tr>
<td style="font-weight:bold;">Username</td>
<td><input type="text" name="username" value=""></td>
</tr>
<tr>
<td style="font-weight:bold;">Password</td>
<td><input type="password" name="password" value=""></td>
</tr>


<tr>
<td></td>
<td><input type="submit" name="Submit" value="Save" style="background-color:#49743D;font-weight:bold;color:#ffffff;"></td>
</tr>
<tr><td colspan=2 align="center" height="10px"></td></tr>
</table>
</form>


</body>
</html>






January 18, 2009 at 11:29 PM

2.Create servlet check for valid user or not.If user valid then it can be
set in the session
session.setAttribute("user",username);
otherwise it back to "user.jsp"

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.sql.*;
import java.sql.*;
import java.util.*;

public class UserLogin extends HttpServlet{

public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException,IOException{
response.setContentType("text/html");
PrintWriter out = response.getWriter();



String username = request.getParameter("username").toString();
String passoword = request.getParameter("password").toString();
HttpSession session = request.getSession(true);

try {

if(username.equals("admin") && passoword.equals("admin"))
{
System.out.println("username : " + username);
session.setAttribute("user",username);
response.sendRedirect("welcome.jsp");

}
else
{
response.sendRedirect("user.jsp");
}

} catch (Exception e) {
e.printStackTrace();
}
}
}



January 18, 2009 at 11:29 PM

"welcome.jsp"

<html>
<head>
</head>
<body>

<table align="center" width="200px" style="background-color:#EDF6EA;border:1px solid #000000;">
<tr><td colspan=2 align="center" height="10px"></td></tr>
<tr>
<td style="font-weight:bold;" align="center" >Welcome <%=session.getAttribute("user")%></td>

</tr>
<tr><td colspan=2 align="center" height="10px"></td></tr>
</table>
</form>


</body>
</html>




Thanks









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