/*
 * 写cookie
*/
Cookie namecookie = new Cookie("name",name);
Cookie passwordcookie = new Cookie("password",password);
Cookie optioncookie = new Cookie("option","1");

//生命周期    
namecookie.setMaxAge(60*60*24*365);
passwordcookie.setMaxAge(60*60*24*365);
optioncookie.setMaxAge(60*60*24*365);
    
response.addCookie(namecookie);
response.addCookie(passwordcookie); 
response.addCookie(optioncookie); 

/*
 * 读cookie
*/
Cookie[] cookies = request.getCookies();
if(cookies!=null)
{
    String name = "";
    String password = "";
    String option = "";
    for (int i = 0; i < cookies.length; i++)
    {
       Cookie c = cookies[i];     
       if(c.getName().equalsIgnoreCase("name"))
       {
          name = c.getValue();
        }
        else if(c.getName().equalsIgnoreCase("password"))
        {
           password = c.getValue();
        }
        else if(c.getName().equalsIgnoreCase("option"))
        {
           option = c.getValue();
        }     
    } 
  }