package moreservlets; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import java.util.*; /** Summarizes information on sessions, the servlet * context and cookies. Illustrates that sessions * and the servlet context are separate for each Web app * but that cookies are shared as long as their path is * set appropriately. *

* Taken from More Servlets and JavaServer Pages * from Prentice Hall and Sun Microsystems Press, * http://www.moreservlets.com/. * © 2002 Marty Hall; may be freely used or adapted. */ public class ShowSharedInfo extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); String title = "Shared Info"; out.println(ServletUtilities.headWithTitle(title) + "\n" + "

" + title + "

\n" + "

Session:"); HttpSession session = request.getSession(true); Enumeration attributes = session.getAttributeNames(); out.println(getAttributeList(attributes)); out.println("
Current Servlet Context:"); ServletContext application = getServletContext(); attributes = application.getAttributeNames(); out.println(getAttributeList(attributes)); out.println("
Servlet Context of /shareTest1:"); application = application.getContext("/shareTest1"); attributes = application.getAttributeNames(); out.println(getAttributeList(attributes)); out.println("
Cookies:
- No cookies found."); } else { Cookie cookie; for(int i=0; i" + cookie.getName()); } } out.println("
\n" + "

\n" + ""); } private String getAttributeList(Enumeration attributes) { StringBuffer list = new StringBuffer("

No attributes found."); } else { while(attributes.hasMoreElements()) { list.append("
"); list.append(attributes.nextElement()); list.append("\n"); } } list.append("

"); return(list.toString()); } }