📄 cookietest.java
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package coreservlets;import java.io.*;import javax.servlet.*;import javax.servlet.http.*;/** Creates a table of the cookies associated with * the current page. Also sets six cookies: three * that apply only to the current session * (regardless of how long that session lasts) * and three that persist for an hour (regardless * of whether the browser is restarted). * <P> * Taken from Core Servlets and JavaServer Pages 2nd Edition * from Prentice Hall and Sun Microsystems Press, * http://www.coreservlets.com/. * © 2003 Marty Hall; may be freely used or adapted. */public class CookieTest extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { for(int i=0; i<3; i++) { // Default maxAge is -1, indicating cookie // applies only to current browsing session. Cookie cookie = new Cookie("Session-Cookie-" + i, "Cookie-Value-S" + i); response.addCookie(cookie); cookie = new Cookie("Persistent-Cookie-" + i, "Cookie-Value-P" + i); // Cookie is valid for an hour, regardless of whether // user quits browser, reboots computer, or whatever. cookie.setMaxAge(3600); response.addCookie(cookie); } response.setContentType("text/html"); PrintWriter out = response.getWriter(); String docType = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " + "Transitional//EN\">\n"; String title = "Active Cookies"; out.println(docType + "<HTML>\n" + "<HEAD><TITLE>" + title + "</TITLE></HEAD>\n" + "<BODY BGCOLOR=\"#FDF5E6\">\n" + "<H1 ALIGN=\"CENTER\">" + title + "</H1>\n" + "<TABLE BORDER=1 ALIGN=\"CENTER\">\n" + "<TR BGCOLOR=\"#FFAD00\">\n" + " <TH>Cookie Name\n" + " <TH>Cookie Value"); Cookie[] cookies = request.getCookies(); if (cookies == null) { out.println("<TR><TH COLSPAN=2>No cookies"); } else { Cookie cookie; for(int i=0; i<cookies.length; i++) { cookie = cookies[i]; out.println("<TR>\n" + " <TD>" + cookie.getName() + "\n" + " <TD>" + cookie.getValue()); } } out.println("</TABLE></BODY></HTML>"); }}⌨️ 快捷键说明
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