registration.java

import java.io.IOException;
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 javax.servlet.http.HttpSession;

/**
 * Servlet implementation class Registration
 */
@WebServlet({ "/Registration", "/registration" })

public class Registration extends HttpServlet {
	private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public Registration() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		DBQuery DB = new DBQuery();
		String login = request.getParameter("login");
		String password_ = request.getParameter("password_");
		String firstname = request.getParameter("firstname");
		String lastname = request.getParameter("lastname");

		HttpSession session=request.getSession();
		session.setAttribute("Login", login);
		session.setAttribute("FirstName", firstname);
		session.setAttribute("LastName", lastname);

		if(DB.unique(login)){
			DB.register(login, password_, firstname, lastname);
			session.setAttribute("Logged-in", "true");
			response.sendRedirect("home.jsp");
		} else {
			session.setAttribute("ErrorMessage", "Username already in use!");
			response.sendRedirect("registration.jsp");
		}
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}