网站换域名 蜘蛛不来/网络广告代理

拦截JSP页面，校验是否已登录

最近使用struts2做项目，需要拦截JSP以校验是否已经登，但struts2的过滤器链只能过滤action。后来发现在web.xml里可以直接增加javax.servlet.Filter实现类的过滤器，可以过滤JSP。请看代码

Filter实现类

package com.common;

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.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class LoginFilter extends HttpServlet implements Filter {

private static final long serialVersionUID = 1L;

@Override

public void doFilter(ServletRequest request, ServletResponse response,

FilterChain chain) throws IOException, ServletException {

HttpServletRequest req = (HttpServletRequest)request;

HttpServletResponse res = (HttpServletResponse)response;

String path = req.getContextPath();

String indexPath = req.getScheme()+"://"+req.getServerName()+":"+req.getServerPort()+path+ "/pages/login.jsp";

if(req.getRequestURI().endsWith("login.jsp"))

{

chain.doFilter(request, response);

return;

}

Object loginuser = req.getSession().getAttribute("loginSession");

if(loginuser == null){

res.sendRedirect(indexPath);

return;

}

chain.doFilter(request, response);

}

@Override

public void init(FilterConfig arg0) throws ServletException {

// TODO Auto-generated method stub

}

}

登录方法：

public String login()

{

Login login = new Login();

//.......校验登录信息

ActionContext ctx = ActionContext.getContext();

Map session = ctx.getSession();

session.put("loginSession", login);

return "success";

}

web.xml配置

setlog

com.common.LoginFilter

setlog

/pages/home.jsp

/pages/channel/*

/pages/content/*

/pages/product/*

/pages/vodtask/*

注意，如果页面上使用了框架，则可能导致session超时后退出到登录页面，此时登录页面显示在框架的某个子页面，解决方法，在登录页面加入如下代码即可。

if (top != window)

top.location.href = window.location.href;

感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！