jsp源码实例5-设置cookie
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
*/
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 then" +
"<A HREF="/servlet/coreservlets.ShowCookies">n" +
"<CODE>ShowCookies</CODE> servlet</A>.n" +
"<P>n" +
"Three of the cookies are associated only with then" +
"current session, while three are persistent.n" +
"Quit the browser, restart, and return to then" +
"<CODE>ShowCookies</CODE> servlet to verify thatn" +
"the three long-lived ones persist across sessions.n" +
"</BODY></HTML>");
}
}
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