shopservlet.java

A JSP Based EShop for searching books and placing Orders

package eshop;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import eshop.model.DataManager;

public class ShopServlet extends javax.servlet.http.HttpServlet
    implements javax.servlet.Servlet {
  private static final long serialVersionUID = 1L;

  public ShopServlet() {
    super();
    }

  public void init(ServletConfig config) throws ServletException {
    System.out.println("*** initializing controller servlet.");
    super.init(config);

    DataManager dataManager = new DataManager();
    dataManager.setDbURL(config.getInitParameter("dbURL"));
    dataManager.setDbUserName(config.getInitParameter("dbUserName"));
    dataManager.setDbPassword(config.getInitParameter("dbPassword"));

    ServletContext context = config.getServletContext();
    context.setAttribute("base", config.getInitParameter("base"));
    context.setAttribute("imageURL", config.getInitParameter("imageURL"));
    context.setAttribute("dataManager", dataManager);

    try {  // load the database JDBC driver
      Class.forName(config.getInitParameter("jdbcDriver"));
      }
    catch (ClassNotFoundException e) {
      System.out.println(e.toString());
      }
    }

  protected void doGet(HttpServletRequest request,
      HttpServletResponse response) throws ServletException, IOException {
    doPost(request, response);
    }

  protected void doPost(HttpServletRequest request,
      HttpServletResponse response) throws ServletException, IOException {
    String base = "/jsp/";
    String url = base + "index.jsp";
    String action = request.getParameter("action");
    if (action != null) {
      if (action.equals("search"))
        url = base + "SearchOutcome.jsp";
      else if (action.equals("selectCatalog"))
        url = base + "SelectCatalog.jsp";
      else if (action.equals("bookDetails"))
        url = base + "BookDetails.jsp";
      else if (action.matches("(showCart|(add|update|delete)Item)"))
        url = base + "ShoppingCart.jsp";
      else if (action.equals("checkOut"))
        url = base + "Checkout.jsp";
      else if (action.equals("orderConfirmation"))
        url = base + "OrderConfirmation.jsp";
      }
    RequestDispatcher requestDispatcher =
      getServletContext().getRequestDispatcher(url);
    requestDispatcher.forward(request, response);
    }
  }