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验证用户是否已经登录与实现自动登录 (50)

发布时间:2015-04-26 12:00:23
验证用户是否已经登录package cn.hongxin.filter;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.ser ...

验证用户是否已经登录与实现自动登录 (50)

验证用户是否已经登录

package cn.hongxin.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 javax.servlet.http.HttpSession;

 

public class LoginFilter implements Filter{

    public void init(FilterConfig filterConfig) throws ServletException {

    }

    public void doFilter(ServletRequest request, ServletResponse response,

           FilterChain chain) throws IOException, ServletException {

       //将request强转成htt...

       HttpServletRequest req = (HttpServletRequest) request;

       //获取session

       HttpSession ss = req.getSession();

       //从session中获取user

       if(ss.getAttribute("user")==null){

原标题:验证用户是否已经登录与实现自动登录 (50)

关键词:登录

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