📄 testhttpsessionservlet.java
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package apibook.c7.s2;import javax.servlet.*;import javax.servlet.http.*;import java.io.*;import java.util.*;//测试HttpSession类public class TestHttpSessionServlet extends HttpServlet { private static final String CONTENT_TYPE = "text/html; charset=EUC_CN"; //Initialize global variables public void init() throws ServletException { } //Process the HTTP Get request public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType(CONTENT_TYPE); PrintWriter out = response.getWriter(); // Get the current session object, create one if necessary HttpSession session = request.getSession(); // Increment the hit count for this page. The value is saved // in this client's session under the name "snoop.count". Integer count = (Integer)session.getAttribute("snoop.count"); if (count == null) count = new Integer(1); else count = new Integer(count.intValue() + 1); session.setAttribute("snoop.count", count); out.println("<HTML><HEAD><TITLE>SessionSnoop</TITLE></HEAD>"); out.println("<BODY><H1>Session Snoop</H1>"); // Display the hit count for this page out.println("You've visited this page " + count + ((count.intValue() == 1) ? " time." : " times.")); out.println("<P>"); out.println("<H3>Here is your saved session data:</H3>"); Enumeration enum = session.getAttributeNames(); while (enum.hasMoreElements()) { String name = (String) enum.nextElement(); out.println(name + ": " + session.getAttribute(name) + "<BR>"); } out.println("<H3>Here are some vital stats on your session:</H3>"); out.println("Session id: " + session.getId() + " <I>(keep it secret)</I><BR>"); out.println("New session: " + session.isNew() + "<BR>"); out.println("Timeout: " + session.getMaxInactiveInterval()); out.println("<I>(" + session.getMaxInactiveInterval() / 60 + " minutes)</I><BR>"); out.println("Creation time: " + session.getCreationTime()); out.println("<I>(" + new Date(session.getCreationTime()) + ")</I><BR>"); out.println("Last access time: " + session.getLastAccessedTime()); out.println("<I>(" + new Date(session.getLastAccessedTime()) + ")</I><BR>"); out.println("Requested session ID from cookie: " + request.isRequestedSessionIdFromCookie() + "<BR>"); out.println("Requested session ID from URL: " + request.isRequestedSessionIdFromURL() + "<BR>"); out.println("Requested session ID valid: " + request.isRequestedSessionIdValid() + "<BR>"); out.println("<H3>Test URL Rewriting</H3>"); out.println("Click <A HREF=\"" + response.encodeURL(request.getRequestURI()) + "\">here</A>"); out.println("to test that session tracking works via URL"); out.println("rewriting even when cookies aren't supported."); out.println("</BODY></HTML>"); } //Clean up resources public void destroy() { }}⌨️ 快捷键说明
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