cookieutil.java

利用index.jsp和url.jsp页面实现自动登陆 index.jsp页面负责从cookie中取出用户名 url.jsp页面负责显示用户名

package com.leon.util;

import javax.servlet.*;
import javax.servlet.http.*;

//从cookie中查询相应的cookie或取得相应的cookie
public class CookieUtil
{
	//输入相应的cookie名称，查找相应的cookie的值
	public static String getCookieValue(HttpServletRequest request,String cookieName)
	{
		Cookie cookie[]=request.getCookies();
		
		if(cookie!=null)
		{
			for(int i=0;i<cookie.length;i++)
			{
				Cookie temp=cookie[i];
				if(temp.getName().equals(cookieName))
				{
					return temp.getValue();
				}
			}
		}
		return null;
	}	
	
	//根据cookie名称查找相应的cookie
	public static Cookie getCookie(HttpServletRequest request,String cookieName)
	{
		Cookie cookie[]=request.getCookies();
		
		if(cookie!=null)
		{
			for(int i=0;i<cookie.length;i++)
			{
				Cookie temp=cookie[i];
				if(temp.getName().equals(cookieName))
				{
					return temp;
				}
			}
		}
		return null;
	}
}