servlet sample projects

i am a java programmer working on JDBC & Swing API. i want myself exposed to projects in Servlet API. So i any of u can provide me a sample project on Servlet it will be much helpful.
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u can impleament a webmail service by servlet it has good new point to learn .
u can touch me and i  will give u more information.

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

public class DBRead extends HttpServlet
    implements SingleThreadModel
    String resultsDir;
    public void init(ServletConfig config)
      throws ServletException {


    public void doGet(HttpServletRequest req, HttpServletResponse res)
      throws ServletException, IOException


        PrintWriter toClient = res.getWriter();

        try {

          DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());

          Connection conn = DriverManager.getConnection ("jdbc:oracle:thin:@",
                                             "scott", "tiger");

          Statement stmt = conn.createStatement ();

          ResultSet rset = stmt.executeQuery ("select * from EMP");
          toClient.println("<HTML> <BODY>" );
          while ( ()) {
            toClient.println ("<BR>" + rset.getString (1) + "   " + rset.getString (2) + "   " +
                                 rset.getString (3) + "   " + rset.getString (4) + "   " +
                                 rset.getString (5) + "   " + rset.getString (6) + "   " +
                                 rset.getString (7) + "   " + rset.getString (8) );
          toClient.println("</BODY> </HTML>");
          conn = null;
      } catch(SQLException e) {


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