這里我們是介紹一個(gè)網(wǎng)站管理后臺(tái)三個(gè)框架頁(yè)面當(dāng)我們的jsp定義的session變量超時(shí)時(shí)用戶點(diǎn)擊時(shí)自動(dòng)退出框架頁(yè)面并跳到登錄頁(yè)面去了，下面我來(lái)給大家演示一個(gè)實(shí)例

當(dāng)session過(guò)期后可以用過(guò)濾器來(lái)設(shè)置重定向頁(yè)面

復(fù)制代碼代碼如下:

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(“l(fā)ogin.jsp”) || url.endsWith(“l(fā)oginAction.do”))) {
filterChain.doFilter(servletRequest, servletResponse);
} else {
req.getRequestDispatcher(“/newestlogin.jsp”).forward(req, res);
}
} else {
filterChain.doFilter(servletRequest, servletResponse);
}
}

但是這樣不能不能跳出iframe等框架。
可以用javaScript解決
在你想控制跳轉(zhuǎn)的頁(yè)面，比如login.jsp中的<head>與</head>之間加入以下代碼：

復(fù)制代碼代碼如下:

<script language=”JavaScript”> 
if (window != top) 
top.location.href = location.href; 
</script>

JS刷新框架的腳本語(yǔ)句

復(fù)制代碼代碼如下:

//如何刷新包含該框架的頁(yè)面用   
<script language=JavaScript>
   parent.location.reload();
</script>  
//子窗口刷新父窗口
<script language=JavaScript>
    self.opener.location.reload();
</script>
(　或　<a href="javascript:opener.location.reload()">刷新</a>   )
//如何刷新另一個(gè)框架的頁(yè)面用   
<script language=JavaScript>
   parent.另一FrameID.location.reload();
</script>
如果想關(guān)閉窗口時(shí)刷新或者想開(kāi)窗時(shí)刷新的話，在<body>中調(diào)用以下語(yǔ)句即可。
<body onload="opener.location.reload()"> 開(kāi)窗時(shí)刷新
<body onUnload="opener.location.reload()"> 關(guān)閉時(shí)刷新
<script language="javascript">
window.opener.document.location.reload()
</script>