New UID()
import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ShoppingCartViewerRewrite extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException,
IOException {
res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println("Current Shopping Cart Items");
out.println("");
// Get the current session ID, or generate one if necessary
String sessionid = req.getPathInfo();
if (sessionid == null) {
sessionid = generateSessionId();
}
// Cart items are associated with the session ID
String[] items = getItemsFromCart(sessionid);
// Print the current cart items.
out.println("You currently have the following items in your cart:
");
if (items == null) {
out.println("None");
} else {
out.println("");
for (int i = 0; i < items.length; i++) {
out.println("- " + items[i]);
}
out.println("
");
}
// Ask if the user wants to add more items or check out.
// Include the session ID in the action URL.
out.println("
");
// Offer a help page. Include the session ID in the URL.
out.println("For help, click
here");
out.println("