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jsp源码实例5(cookie)

关注+2004-11-07作者:蓝点

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).

*



* Taken from Core Servlets and JavaServer Pages

* from Prentice Hall and Sun Microsystems Press,

* http://www.coreservlets.com/.

* © 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; 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 title = "Setting Cookies";

out.println

(ServletUtilities.headWithTitle(title) +

"\n" +

"

" + title + "

\n" +

"There are six cookies associated with this page.\n" +

"To see them, visit the\n" +

"\n" +

"ShowCookies servlet
.\n" +

"

\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" +

"ShowCookies servlet to verify that\n" +

"the three long-lived ones persist across sessions.\n" +

"");

}

}


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