Java 对 Cookie增删改查的实现示例

public static Cookie[] GetCookies(HttpServletRequest request){
  return request.getCookies();
}

public static Cookie getCookieByName(HttpServletRequest request, String name) {
  if (StringUtils.isBlank(name)) {
    return null;
  }
  Cookie[] cookies = getCookies(request);
  if (null != cookies) {
    for (Cookie cookie : cookies) {
      if (name.equals(cookie.getName())) {
        return cookie;
      }
    }
  }
  return null;
}

public static boolean addCookie(HttpServletResponse response, String name, String value,
      int maxAge) {
  if (StringUtils.isBlank(name) || StringUtils.isBlank(value)) {
    return false;
  }
  Cookie cookie = new Cookie(name.trim(), value.trim());
  if (maxAge <= 0) {
    maxAge = Integer.MAX_VALUE;
  }
  cookie.setMaxAge(maxAge);
  cookie.setPath("/");
  response.addCookie(cookie);
  return true;
}

public static boolean removeCookie(HttpServletRequest request, HttpServletResponse response,
      String name) {
  if (StringUtils.isBlank(name)) {
    return false;
  }
  Cookie[] cookies = getCookies(request);
  if (null != cookies) {
    for (Cookie cookie : cookies) {
      if (name.equals(cookie.getName())) {
        cookie.setValue(null);
        cookie.setMaxAge(0);
        cookie.setPath("/");
        response.addCookie(cookie);
        return true;
      }
    }
  }
  return false;
}