📄 showservlet.java
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package test;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
/**
* An HTTP servlet that displays the contents of a customer's shopping cart at
* Duke's Bookstore. It responds to the GET and HEAD methods of the HTTP
* protocol. This servlet calls other servlets.
*/
public class ShowServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// Get the user's session and shopping cart
HttpSession session = request.getSession();
String cart = (String) session.getAttribute("cart");
System.out.println("cart==" + cart);
//
// // If the user has no cart, create a new one
if (cart == null) {
cart = "haha";
session.setAttribute("cart", cart);
}
// set content type header before accessing the Writer
response.setContentType("text/html");
response.setBufferSize(8192);
PrintWriter out = response.getWriter();
//urlrewrite.jsp
//Print out the response
out.println("<html>" + "<head><title>" + "URLRewriting" + "</title></head>");
out.println("<font size=\"+2\">" + "URLRewriting Test" + "</font>" + "<br> <br>" + "<center><a href=\""
+ response.encodeURL(request.getContextPath() + "/urlrewrite.jsp?user=yangbing") + "\">" + "test"
+ "</a> </center>");
out.println("<font size=\"+2\">" + "URLRewriting Test" + "</font>" + "<br> <br>" + "<center><a href=\""
+ request.getContextPath() + "/urlrewrite.jsp?user=yangbing" + "\">" + "test" + "</a> </center>");
// out.print("<p>");
// out.print("<h2>session id==" + session.getId());
// out.print("<h2>create time==" + session.getCreationTime());
// out.print("<h2>last access time==" + session.getLastAccessedTime());
out.println("</body> </html>");
out.close();
}
public String getServletInfo() {
return "The ShowCart servlet returns information about"
+ "the books that the user is in the process of ordering.";
}
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