Key words: session, redirection. Analysis Login.htm: Responsible for accepting user input information, such as user name and password. Login.jsp: Responsible for accepting the data submitted by the login.htm and connects to the legality of the database for user identity. REOGIN.HTM: Responsible for users re-enter. Info.jsp: Users legally log in and redirected to the page after approved by the system. The user enters information in login.htm and submits a post-handed login.jsp processing, if legal, redirect to INFO.jsp; if you do not legally redirect to Relogin.htm re-login, where the list of action is: Action = " Login.jsp "The same as the Login.htm Action item. Judging with the session. Implementation: (1) <% in Login.jsp <% ........... // ourselves plus other code. Session.setttribute ("login", "ok"); ...... .....%> (2) in info.jsp: <%
String login = (string) session.getattribute ("login");
IF (login! = null && login.equals ("ok")) {
// do nothing;
}
Else {
Response.sendRedirect ("Relogin.htm");
}
%>
<1> Write the case in case case request setHeader SetAttribute GetAttribute String <2> Redirect common: response.sendredirect ("Relogin.htm");
