jsp实现cookie的使用 - 站长资源库


答案：

                        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/. 
* © 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) + 
"<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=>"<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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