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Solve session expiration in Jsp jump to login page and jump out of iframe framework

Source: Internet
Author: User
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Here we will introduce a website management backend three framework pages. When the session variable defined in jsp times out, the user will automatically exit the framework page upon clicking it and jump to the logon page, the following is an example.

When the session expires, you can use a filter to set the redirection page.

The Code is as follows: Copy code

Public class ActionFilter extends HttpServlet implements Filter {
Private FilterConfig filterConfig;

Public void init (FilterConfig config ){
This. filterConfig = config;
}

Public void doFilter (ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws ServletException, IOException {
HttpServletRequest req = (HttpServletRequest) servletRequest;
ServletRequest. setCharacterEncoding (UTF-8 ″);
HttpServletResponse res = (HttpServletResponse) servletResponse;
String url = req. getRequestURI ();
SysUserVOImpl user = (SysUserVOImpl) req. getSession (). getAttribute ("SysUser ");

If (null = user ){
If (! COMMON. isEmpty (url) & (url. endsWith ("newestlogin. jsp ") | url. endsWith ("UserLoginAction. jsp ") | url. endsWith ("login. jsp ") | url. endsWith ("loginAction. do "))){
FilterChain. doFilter (servletRequest, servletResponse );
} Else {
Req. getRequestDispatcher ("/newestlogin. jsp"). forward (req, res );
}
} Else {
FilterChain. doFilter (servletRequest, servletResponse );
}
}

However, you cannot jump out of frameworks such as iframe.

It can be solved using javaScript

Add the following code between the pages you want to control the redirection, such as

The Code is as follows: Copy code

<Script language = "JavaScript">
If (window! = Top)
Top. location. href = location. href;
</Script>


JS refresh framework script statement

The Code is as follows: Copy code

// How to refresh the page containing the framework
<Script language = JavaScript>
Parent. location. reload ();
</Script>

// Refresh the parent window in the Child Window
<Script language = JavaScript>
Self. opener. location. reload ();
</Script>
(Or <a href = "javascript: opener. location. reload ()"> refresh </a>)

// How to refresh the page of another framework
<Script language = JavaScript>
Parent. Another FrameID. location. reload ();
</Script>

If you want to refresh the window when closing the window or refresh the window when opening the window, you can call the following statement in <body>.

<Body onload = "opener. location. reload ()"> refresh when opening a window
<Body onUnload = "opener. location. reload ()"> refresh when disabled

<Script language = "javascript">
Zookeeper opener.doc ument. location. reload ()
</Script>

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