Hi, Im having problems with a login script. I have got a login form that sucessfully passes the data to the login process form but the login process form, but then nothing happens after the SQL statement is run apart from a white screen being shown with my two test out statements for the username and password.
The SQL works in a accss sql query but doens't seem to do much in the java servlet.
I would greatly appreciate it if you could take a look at the code, the database is being connected from a db conenction page.
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package servlets;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import dbclasses.DBConnector;
public class Loginprc extends HttpServlet {
private Connection conn;
DBConnector db= new DBConnector();
/**
* 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
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
HttpSession session = null;
ResultSet rsdoLogin = null;
PreparedStatement psdoLogin=null;
String sUserID=request.getParameter("usersusername");
String sPassword=request.getParameter("userspassword");
out.println(sUserID);
out.println(sPassword);
String message="User login successfully ";
try{
db.createConnection();
// String sqlOption="SELECT * FROM useraccount WHERE Username = ? and Password = ?";
String sqlOption = "SELECT * FROM useraccount WHERE Username = 'andy' AND Password = 'andy'";
psdoLogin=conn.prepareStatement(sqlOption);
//psdoLogin.setString(1,sUserID);
// psdoLogin.setString(2,sPassword);
rsdoLogin=psdoLogin.executeQuery();
if (rsdoLogin.next())
{
out.println("Blah");
/* String sUserName=rsdoLogin.getString("sFirstName")+" "+rsdoLogin.getString("sLastName");
session.setAttribute("sUserID",rsdoLogin.getString("sUserID"));
session.setAttribute("iUserType",rsdoLogin.getString("iUserType"));
session.setAttribute("iUserLevel",rsdoLogin.getString("iUserLevel"));
session.setAttribute("sUserName",sUserName);
*/
response.sendRedirect("success.jsp?error="+message);
}
else
{
out.println("Blah1111");
message="No user or password matched" ;
response.sendRedirect("login.jsp?error="+message);
}
}
catch(Exception e)
{
e.printStackTrace();
}
/// close object and connection
try{
if(psdoLogin!=null){
psdoLogin.close();
}
if(rsdoLogin!=null){
rsdoLogin.close();
}
if(conn!=null){
conn.close();
}
}
catch(Exception e)
{
e.printStackTrace();
}
/* String usersusername1, userspassword1;
usersusername1 = request.getParameter("usersusername");
userspassword1 = request.getParameter("userspassword");
try {
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet Loginprc</title>");
out.println("</head>");
out.println("<body>");
session = request.getSession(true);
out.println("<h1>Servlet Loginprc at " + request.getContextPath () + "</h1>");
out.println("</body>");
out.println("</html>");
session.setAttribute("username1",usersusername1);
} */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
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* 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 {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
Cheers