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解决session过期跳转到登陆页面并跳出iframe框架

框架网页登录跳出iframe 
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/**
* 访问控制过滤器
*/
package com.lz.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.lz.pojo.Userinfo;
import com.lz.util.DefaultElements;

/**
* @author zxj
* @version 9:47:52 AM Jan 11, 2011
*/
public class AccessFilter implements Filter {

public static String loginurl;
public static String errorurl;

/* (non-Javadoc)
  * @see javax.servlet.Filter#destroy()
  */

public void destroy() {
  // TODO Auto-generated method stub

}


public void doFilter(ServletRequest arg0, ServletResponse arg1,
   FilterChain arg2) throws IOException, ServletException {
  // TODO Auto-generated method stub
  HttpServletRequest request = (HttpServletRequest) arg0;
  HttpServletResponse response = (HttpServletResponse) arg1;

  Userinfo user = (Userinfo) request.getSession().getAttribute("user");

  
  if (user == null) {
   response.sendRedirect(DefaultElements.LOGINURL);
   return;
  }
  arg2.doFilter(request, response);
}

public void init(FilterConfig arg0) throws ServletException {
}

}



但是这样不能不能跳出iframe等框架。

可以用javaScript解决
在你想控制跳转的页面，比如login.jsp中的<head>与</head>之间加入以下代码：

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