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import java.sql.Connection;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Ayush Srivastava
 */
@WebServlet(urlPatterns = {"/conne"})
public class conne extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
@SuppressWarnings("empty-statement")
protected void processRequest(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException, ClassNotFoundException, SQLException {
String connectionURL="jdbc:mysql://localhost:3306/mysql";
String id;
String fee;
String name;
String pass;
String login;
id=request.getParameter("SID");
name=request.getParameter("name");
fee=request.getParameter("FeePaid");
pass=request.getParameter("password");
login=request.getParameter("login_ID");

Connection connection=null;
Statement statement;
ResultSet rs;
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try{
    out.println("<HTML>");
    out.println("<Body>");
Class.forName("com.mysql.jdbc.Driver");
connection=DriverManager.getConnection(connectionURL,"root","");
statement=connection.createStatement();
rs=statement.executeQuery("select * from srudentdetails where LoginID='"+login+"';");
if(!rs.next()){
int f=statement.executeUpdate("insert into srudentdetails values('"+id+"','"+fee+"','"+name+"','"+login+"','"+pass+"');");
}
else{
    out.println("<p>Username Exists</p>");
    }
    out.println("<a href='login.jsp'>Go Back </a>");
//while(rs.next()){
//out.println(rs.getString("name")+"<br>");
//out.println(rs.getString("last")+"<br>");
// out.println(rs.getString("telephone")+"<br>");
// out.println(rs.getString("email")+"<br>");
//}
//s.close();


}
catch(ClassNotFoundException | SQLException e){
    ;
}

        }

    // <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
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
    try {
        processRequest(request, response);
    } catch (ClassNotFoundException | SQLException ex) {
        Logger.getLogger(conne.class.getName()).log(Level.SEVERE, null, ex);
    }
    }

    /**
     * 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
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
    try {
        processRequest(request, response);
    } catch (ClassNotFoundException | SQLException ex) {
        Logger.getLogger(conne.class.getName()).log(Level.SEVERE, null, ex);
    }
    }

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

}