求：jsp 怎么读取cookies,最好有实例程序

Question

我想通过cookies来判断用户是否登录，cookies名字为:"wwwzzylcn"

Answer 1

写cookie
＜% 
String cookieName="Sender"; 
Cookie cookie=new Cookie(cookieName, "Test_Content"); 
cookie.setMaxAge(10); //存活期10秒
response.addCookie(cookie); 
%＞ 读cookie
＜% 
Cookie cookies[]=request.getCookies(); 
Cookie sCookie=null; 
String svalue=null; 
String sname=null; 
for(int i=0;i{ 
sCookie=cookies[i]; 
svalue=sCookie.getValue(); sname=sCookie.getName(); 
out.println(sname+":"+svalue);
%＞ 

Answer 2

try 
{ 
Cookie c = new Cookie("cookiesname","str"); 
response.addCookie(c); 
} 
catch(Exception e) 
{ 
      System.out.println(e); 
} 
Cookie cookies[]=request.getCookies(); 
String cookiesValue="";
if(cookies!=null){
  for(int i=0;i<cookies.length;i++){
    if(cookies[i].getName().equals("cookiename"))
       cookiesValue=cookies[i].getValue();
  }}