java使用Cookie判断用户登录情况的方法

public boolean isLogin() {
    Set<Cookie> cookies = this.browser.getCookies();
    String JSESSIONIDID = "JSESSIONID";
    String sessionIdID = "sessionId";
    String loginID = "login";
    String JSESSIONIDIDValue = "";
    String sessionIdValue = "";
    String loginValue = "";
    for (Cookie c:cookies) {
      logger.info(c.getName() + ": " + c.getValue());
      if (c.getName().equals(JSESSIONIDID)) {
        JSESSIONIDIDValue = c.getValue();
      } else if(c.getName().equals(sessionIdID)) {
        sessionIdValue = c.getValue();
      } else if (c.getName().equals(loginID)) {
        loginValue = c.getValue();
      }
    }    
    if ( JSESSIONIDIDValue.equals(sessionIdValue) & loginValue.equals("login")) {
      return true;
    } else {
      return false;
    }
  }