Jsp settings page expiration

Server method:
<%
Response. setHeader ("Pragma", "No-cache ");
Response. setHeader ("Cache-Control", "no-cache ");
Response. setDateHeader ("Expires",-10 );
%>
Add this code on the login page and after login page.
Note that you must make the session invalid on the login page (or pages with similar functions)

Client method:

Meta is used to simulate HTTP Response Header packets in HTML documents. Meta Tags are used in Name attribute

1. <meta name = "Generator" contect = ""> describes generation tools (such as Microsoft FrontPage 4.0;

2. <meta name = "KEYWords" contect = ""> describe KEYWords Of Your webpage to search engines;

3. <meta name = "DEscription" contect = ""> tell the search engine the main content of your site;

4. <meta name = "Author" contect = "Your name"> tell the search engine the creator of your site;

5. <meta name = "Robots" contect =

"All | none | index | noindex | follow | nofollow">

The attributes are described as follows:

Set to all: the file will be retrieved, and the link on the page can be queried;

Set to none: files will not be retrieved, and links on the page cannot be queried;

Set to index: the file will be retrieved;

Set to follow: links on the page can be queried;

Set to noindex: the file will not be retrieved, but the link on the page can be queried;

Set to nofollow: files will not be retrieved, and links on the page can be queried.

Http-equiv attributes

1. <meta http-equiv = "Content-Type" contect = "text/html"; charset = gb_2312-80 ">

And <meta http-equiv = "Content-Language" contect = "zh-CN"> to describe the text and Language used by the homepage;

Also such as English is the ISO-8859-1 character set, there are BIG5, UTF-8, shift-Jis, Euc, Koi8-2 and other character sets;

2. <meta http-equiv = "Refresh" contect = "n; url = http: // yourlink"> regularly redirect a webpage to http within the specified time; // yourlink;

3. <meta http-equiv = "Expires" contect = "Mon, 12 May 2001 00:20:00 GMT"> you can set the expiration time of a webpage, once it expires, it must be called again on the server. Note that the GMT time format must be used;

4. <meta http-equiv = "Pragma" contect = "no-cache"> is used to disable the browser from accessing the page content from the cache of the local machine, once the page is set, it cannot be called out from the Cache;

5. <meta http-equiv = "set-cookie" contect = "Mon, 12 May 2001 00:20:00 GMT"> cookie setting: If the webpage expires, the cookie on the disk will be deleted. Note that the GMT time format must be used;

6. <meta http-equiv = "Pics-label" contect = ""> webpage rating: There is a content setting in internet Options of IE, it can prevent browsing of some restricted websites, and the website's restricted level is set through the meta attribute;

7. <meta http-equiv = "windows-Target" contect = "_ top"> force the page to be displayed on an independent page in the current window, it can prevent your webpage from being called as a frame page by others;

8. <meta http-equiv = "Page-Enter" contect = "revealTrans (duration = 10, transtion =

50) "> and <meta http-equiv =" Page-Exit"

Contect = "revealTrans (duration = 20, transtion

= 6) "> set the special effect when entering and leaving the page. This function is the" format/Webpage transition "in FrontPage, but the page to be added cannot be a frame page.