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    "); // Keep trace of the instance count by putting a reference to this // instance in a hashtable. Duplicate entries are ignored. // The size() method returns the number of unique instances stored. instances.put(this, this); out.println("There are currently " + instances.size() + " instances.

    "); classCount++; out.println( "Across all instances, this servlet class has been accessed " + classCount + " times.

    "); out.println("This is Session: " + request.getSession()); out.println(""); out.close(); } } PK `R0~??WEB-INF/src/SimpleCounter.javaimport javax.servlet.*; import javax.servlet.http.*; import java.io.PrintWriter; import java.io.IOException; public class SimpleCounter extends HttpServlet { private static final String CONTENT_TYPE = "text/html; charset=windows-1252"; int count = 0; String requestMethod = null; public void init(ServletConfig config) throws ServletException { super.init(config); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType(CONTENT_TYPE); PrintWriter out = response.getWriter(); if (requestMethod == null) { requestMethod = "GET"; } out.println(""); out.println("SimpleCounter Example"); out.println(""); out.println("

    Simple Counter

    "); out.println("

    "); out.println("The servlet has called using the " + requestMethod + " method."); out.println("

    "); count++; out.println("Counters"); out.println("

      "); out.println("
    • This servlet has been called " + count + " times."); out.println("
    "); out.println("

    "); String requestedSessionID = request.getRequestedSessionId(); HttpSession httpSession = request.getSession(); String sessionID = httpSession.getId(); out.println("Sessions"); out.println("

      "); out.println("
    • Requested Session ID: " + requestedSessionID); out.println("
    • Session ID: " + sessionID); out.println("
    "); out.println("

    "); out.println(""); out.close(); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType(CONTENT_TYPE); PrintWriter out = response.getWriter(); requestMethod = "POST"; } }PK `R0\fȽWEB-INF/web.xml Empty web.xml file for Web Application SimpleCounter SimpleCounter HolisticCounter HolisticCounter 30 html text/html txt text/plain index.jsp index.html PK `R0=L index.html Servlet Examples

    Examples Servlets

    Jeffrey Hunter, Sr. Database Administrator

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