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package coreservlets;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

/** 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
* from Prentice Hall and Sun Microsystems Press,
* http://www.coreservlets.com/.
* copy; 2000 Marty Hall; may be freely used or adapted.
*/

public class SetCookies extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
for(int i=0; i3; 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 title = "Setting Cookies";
out.println
(ServletUtilities.headWithTitle(title) +
"BODY BGCOLOR=\"#FDF5E6\">\n" +
"H1 ALIGN=\"CENTER\">" + title + "/H1>\n" +
"There are six cookies associated with this page.\n" +
"To see them, visit the\n" +
"A HREF=\"/servlet/coreservlets.ShowCookies\">\n" +
"CODE>ShowCookies/CODE> servlet/A>.\n" +
"P>\n" +
"Three of the cookies are associated only with the\n" +
"current session, while three are persistent.\n" +
"Quit the browser, restart, and return to the\n" +
"CODE>ShowCookies/CODE> servlet to verify that\n" +
"the three long-lived ones persist across sessions.\n" +
"/BODY>/HTML>");
}
}

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jsp實(shí)現(xiàn)cookie的使用