Java使用cookie实现简单的单点登录功能

（一）取得cookie中的相关信息
Cookie[]cookies = request.getCookies();

          Stringusername = "";
          Stringpassword = "";

          if (cookies!= null) {
             for (int i =0; i < cookies.length; i++) {
                Cookie c =cookies[i];

                if(c.getName().equalsIgnoreCase("xabpoUsername")) {
                   username =c.getValue();
                } else if(c.getName().equalsIgnoreCase("xabpoPassword")) {
                   password =c.getValue();
               }
            }
         }
（二）将登陆用户的用户名和密码保存到cookie中
          Cookie cookieUsername = newCookie("xabpoUsername",userForm.getUserID());
         Cookie cookiePassword = newCookie("xabpoPassword",userForm.getPassword())               cookieUsername.setMaxAge(60*60*24); //设定有效时间
         cookiePassword.setMaxAge(60*60*24);
         cookieUsername.setPath("/");
         cookiePassword.setPath("/");
         cookieUsername.setDomain(".xasourcing.gov.cn"); //设定有效域
         cookiePassword.setDomain(".xasourcing.gov.cn");
         response.addCookie(cookieUsername);
         response.addCookie(cookiePassword);
（三）退出登录的时候将cookie删除
Cookie[]cookies=request.getCookies();